Jul 24 2009 The Gosselin girls are growing up! Kate took her twin daughters, Cara and Mady, 8, and a friend to see the Jonas Brothers concert at the Wachovia Center in Philadelphia last night. The oldest kids of Jon and Kate's 8 were decked out in age appropriate outfits that didn't match. While Jon has taken a liking to Ed Hardy apparel, Kate unleashed a more sassy look wearing dark dungarees, a hot pink tank, strappy sandals and shades. No word on whether the mom and daughters rocked out to Love Bug, but it looks like they had a fun girls' night out!