With warm weather comes the exciting opportunity to bare your arms (or sometimes even your abs) — and we couldn't be more excited at the prospect of picking up some sweet new tops for the season ahead. From hot tops to wear at night and not-so-basic button-downs to pretty pieces in lightweight lace, crochet, and chiffon, we've got you covered when it comes to updating your wardrobe from the waist up. We've rounded up 50 Summer-perfect tops, all coming in under a cool 50 bucks — click through now to see and shop them all.

This week in the world of social media, it was all about spending time with fashionable friends and sharing sweet snaps along the way. Poppy Delevingne and Henry Holland played a game of telephone (with sparkly heels, no less), and Sienna Miller snuggled with her baby girl, Marlowe, during a daytime birthday party. Coco Rocha set sail across the Sydney Harbour as fellow model Bar Refaeli shaded her face from the sun during a beach day. Prabal Gurung posed with his high-profile celebrity pals at his Vogue x MAC Cosmetics event (just imagine being able to call Zoe Saldana and Diane Kruger your friends!), while BFFs Karlie Kloss and Jourdan Dunn hit the kitchen for a cooking segment. Cara Delevingne shared a snap of the "weirdest breakfast ever" — and can you guess which model mom got back to nature with a horseback ride to the beach?

Click through now to see the rest of this week's cutest celebrity candids and don't forget to follow POPSUGAR Style on Instagram, Facebook, and Twitter!

The NBA playoffs are under way, and you don't have to be a basketball fanatic to appreciate all the amazing celebrity sideline style. And while a sporting event may not be the first place we would rock five-inch heels, it certainly works for the likes of Beyoncé and Victoria Beckham. Meanwhile, Olivia Wilde opted to show her New York Knicks pride by wearing the team's colors: blue and orange. From coast to coast, fashionable stars have stepped out in cool ensembles to cheer on the LA Lakers and Brooklyn Nets, too — and we're highlighting some of our favorite courtside looks. Click through to see them all now!

It seems like celebrities were taking the opportunity to spend time with loved ones this week — Jessica Alba, Miranda Kerr, and Doutzen Kroes all shared sweet snaps with their little ones, while Emmy Rossum and Zooey Deschanel both made time for their furry, four-legged family members. We got a glimpse of Lea Michele's vacation fun as she hit the beach, and Brad Goreski treated his followers to a sexy selfie of his toned abs. Rihanna also showed some skin while modeling some pieces from her latest River Island collection, and Miley Cyrus looked equally stylish while hitting the recording studio with Pharrell Williams.

Click through to see the rest of this week's cutest celebrity candids, and be sure to follow POPSUGAR on Instagram, Facebook, and Twitter!

Brad Pitt appeared to be in good spirits as he arrived at Paramount Studios in LA today. It has likely been an emotional couple of days for the actor and his family, as news of his fiancé Angelina Jolie's preventative double mastectomy was revealed earlier this week. Angelina's heartfelt and honest op-ed for the New York Times was published on Tuesday, and she spoke candidly about her decision to undergo the procedure after learning that she was at high risk for developing breast and ovarian cancers. Angelina will also reportedly be planning to have her ovaries removed as well.

Shortly after Angelina's article was published, Brad released his own touching statement to a UK newspaper, and spoke to USA Today about Angelina's brave and empowering decision, saying that "she could have stayed absolutely private about it and I don't think anyone would have been none the wiser with such good results. But it was really important to her to share the story and that others would understand it doesn't have to be a scary thing. In fact, it can be an empowering thing, and something that makes you stronger and us stronger."

Brad will also be back in the spotlight soon when he steps out to start promoting World War Z ahead of its June 21 release.

Lauren Conrad may be best known for her starring roles on Laguna Beach and The Hills, but over the years she has proven herself to be quite the triple treat. The blond beauty has blossomed into an author, designer, and beauty guru — not to mention one of our favorite celebrity social media fixtures. What we love most about Lauren's style is how laid-back, put-together, and incredibly accessible it is. She's got a serious knack for fusing high fashion with California beach babe, which is an aesthetic that we can all get behind. From embellished party dresses to glamorous red carpet confections, Lauren's signature style continues to evolve — and she's taught us more than a few styling lessons along the way. So get a pen and grab a seat, then take note of LC's most stylish looks over the years.

— Additional reporting by Mandi Villa

Alessandra Ambrosio made the most of the warm LA weather while running errands with her daughter, Anja Mazur, on Monday. The model mom showed off her legs in a pair of printed shorts as 4-year-old Anja did some showing off as well, smiling and posing for the cameras. Alessandra is likely excited to be reunited with her adorable mini me after wrapping up some business in Dallas, TX, over the weekend. Despite having to work on Mother's Day, she shared family photos through social media, as well as snaps of a yummy dessert she enjoyed while on set.

Alessandra is also off to a great month with Victoria's Secret. She's featured in the brand's "Summer of Sexy" swim catalog and recently teamed up with her fellow Angels to announce the winners of the Victoria's Secret What Is Sexy 2013 list, which includes stars like Nina Dobrev, Zoe Saldana, and Beyoncé.

Zoe Saldana sports big curls — and not much else — on the June cover of Allure magazine, which hits newsstands May 21. The gorgeous Star Trek Into Darkness star went topless and completely nude for the accompanying photo shoot, showing off her toned physique and many tattoos. Zoe hasn't been shy about flaunting her figure on the red carpet either — she's been touring the globe with her Star Trek castmates to promote the sequel ahead of its May 17 release and sporting some daring outfits along the way. In the magazine, Zoe opens up about her dating past, ethnic pride, and pursuing her dreams. Here's more from Zoe Saldana in Allure:

• On dating actors and her sexuality: “"Been there, done that, got the t-shirt. [I might] end up with a woman raising my children. . . . That's how androgynous I am."
• On having pride in her ethnicity: "It doesn't matter how much backlash I will get for it; I will honor and respect my black community because that's who I am."
• On knowing what she wants and pursuing her dreams: "It's OK to say, 'This is what I want' — and go after it. And if it doesn't happen, it's OK. Be a reasonable person with yourself. If I have something good in front of me, it doesn't matter if it's a person or a pair of shoes, I'm not going to test something else. . . . It's insecure and it's immature.”

Miley Cyrus is No. 1 on Maxim's annual Hot 100 list, after beating out a roster of sexy stars like Megan Fox, Cameron Diaz, Rihanna, and Beyoncé. She may have gotten her start as Hannah Montana — but judging by her edgy haircut, skin-baring ensembles, and the engagement ring that's (sometimes) on her finger, it's pretty clear that Miss Miley is all grown up. She's gotten progressively more experimental with her style over the past couple of years and has been mixing things up with microminis, strategic cutouts, and dangerously low necklines — not to mention a midriff-baring look or two. To celebrate Miley's hot Maxim news, we're taking a look at 10 of her sexiest red carpet looks so far. Click through now to see them all.

Models, designers, celebrities, and more descended upon Manhattan this week for the 2013 Met Gala, and made sure to share their punk-infused snaps throughout the event. In addition to those high-glamour photos, we also got a glimpse of our fashionable favorites in their moments of work and play. Hilary Rhoda had an unfortunate spill on the set, while her fellow model Coco Rocha showed off her most-loved color of the moment. Cara Delevingne cozied up to Karl Lagerfeld in Singapore, and Stella McCartney made a special visit to Rihanna's concert in London. Also hanging across the pond was Nicky Hilton, who shared a cool candid snap in front of a classic British phone booth, while Bar Refaeli warned against the dangers of skinny dipping — alone.

Click through now to see the rest of this week's cutest celebrity candids, and don't forget to follow POPSUGAR Style and Trends on Instagram, Facebook, and Twitter!

Models, designers, celebrities, and more descended upon Manhattan this week for the 2013 Met Gala, and made sure to share their punk-infused snaps throughout the event. In addition to those high-glamour photos, we also got a glimpse of our fashionable favorites in their moments of work and play. Hilary Rhoda had an unfortunate spill on the set, while her fellow model Coco Rocha showed off her most-loved colour of the moment. Cara Delevingne cosied up to Karl Lagerfeld in Singapore, and Stella McCartney made a special visit to Rihanna's concert in London. Also hanging across the pond was Nicky Hilton, who shared a cool candid snap in front of a classic British phone booth, while Bar Refaeli warned against the dangers of skinny dipping — alone.

Click through now to see the rest of this week's cutest celebrity candids, and don't forget to follow POPSUGAR Style on Instagram, Facebook, and Twitter!

One of our favorite on- and offscreen couples, Nina Dobrev and Ian Somerhalder, have called it quits. The Vampire Diaries stars dated for over three years, and despite their breakup, they'll still be working together on set when the fifth season begins filming. Nina and Ian aren't the first TV costars to strike up a romantic relationship — small-screen duos like Rachel Bilson and Adam Brody, Blake Lively and Penn Badgley, and Vanessa Hudgens and Zac Efron also hooked up during their downtime, and leading ladies like Jennifer Garner, Emily VanCamp, and Sophia Bush were lucky enough to find love on more than one set. Click through to see 30 couples that took their love off screen — and even worked together well past their demise.

Now that the Met Gala has wrapped, stars are back to work, play, and spending time with loved ones — and sharing all of their cute candid moments through social media. Miranda Kerr headed to a Great Gatsby screening and shared a photo of her very chic 3D glasses, while Ashley Benson showed some skin — and not in the good way. Stella McCartney was sandwiched between close pals Chris Martin and Jay-Z, and Sienna Miller laid a smooch on her model friend Cara Delevingne. Also inside: Carly Rae Jepsen's fiery new 'do, Rihanna's postgig gifts, and Bar Refaeli's early-morning workout.

Click through to see the rest of this week's cutest celebrity candids, and be sure to follow POPSUGAR on Instagram, Facebook, and Twitter!

Target announced today that it is collaborating with designer Phillip Lim on an exclusive Fall 2013 collection, slated to hit Target stores on Sept. 15. The range will feature over 100 items for both men and women, including apparel, shoes, bags, and travel accessories — all priced between $20-$300. We can also expect the collection to be rooted in a classic autumnal palette, and collaboration line aside, the designer will stick to his signature modern, sophisticated aesthetic. Phillip Lim explained that he's been "intrigued by the idea of a design evolution" since an early age, and is excited at the prospect of creating a collection "that would inspire — one that is cool and chic, but still very accessible." Does that mean we'll see a Pashli look-alike?

In honor of the designer's big collaboration news, we've rounded up some of our favorite 3.1 Phillip Lim runway looks over the years — as well as Target's video sneak peek and your first look at Lim's sketches. Click through to see them all now, and don't forget to mark your calendars for Sept. 15!

Hold on to your (leather) hats: Madonna is being honored as the Top Touring Artist at next week's Billboard Music Awards in the States, thanks to the worldwide success of her recent MDNA tour.

The international superstar, clothing chameleon, and ultimate risk-taker has brought so much good to our lives — and single-handedly ushered in tons of trends since she hit the scene in the early '80s. From fingerless lace gloves to cone bras and stacks of rubber bracelets (the original arm party, in our opinion), Madonna has a long history of setting trends and paving the way for fashion freedom — and if her punk-inspired look from Monday's Met Gala is any indication, it doesn't look like she's stopping anytime soon. We're taking a look back at the many trends that Madonna set into motion — click through to see them all now.

Hold on to your (leather) hats: Madonna is being honored as the Top Touring Artist at next week's Billboard Music Awards, thanks to the worldwide success of her recent MDNA tour.

The international superstar, clothing chameleon, and ultimate risk-taker has brought so much good to our lives — and single-handedly ushered in tons of trends since she hit the scene in the early '80s. From Ray-Ban Wayfarers and fingerless lace gloves to cone bras and stacks of rubber bracelets (the original arm party, in our opinion), Madonna has a long history of setting trends and paving the way for fashion freedom — and if her punk-inspired look from Monday's Met Gala is any indication, it doesn't look like she's stopping anytime soon. We're taking a look back at the many trends that Madonna set into motion — click through to see them all now.

We love seeing the stars' behind-the-scenes moments as they celebrate at big events — and the Costume Institute Gala was nothing short of fabulous. Some of our favorite snap-happy celebs like Gisele Bundchen, Miranda Kerr, and Stella McCartney got dolled up in their finest punk-inspired pieces and shared their fun, filtered photos from the red carpet and beyond. From the dressing room to the afterparties, we've rounded up all of the cute candids from the evening's fashionable festivities — click through to see all of them now.