Guess Who! Which Gossip Girl Star Was Caught Showing Off Her Super-Toned Abs? 1 of 2 Previous Autoplay Next Share Tweet August 21, 2012 at 07:18PM EDT by Daynah Burnett Related: Gossip Girl full size Credit: Jason Merritt WireImage Guess Who! We know — midriffs are so 2001. But not if you're headed to the gym — and not if they your abs look like this. Can you guess which Gossip Girl star was spotted on her way to workout with her enviable abs on full display?