Back of Blake Lively Steals the Scene on Set With Her Gossip Girl Costars Blake Lively didn't leave much to the imagination yesterday while filming Gossip Girl outside the Standard Hotel in NYC. She worked alongside her new love interest, played by Mad Men's Sam Page. Leighton Meester, meanwhile, stayed relatively covered up for their day in front of the cameras. Blake, who turned 23 just last week, was also hard at work on their upcoming season on Monday, when she and real-life boyfriend Penn Badgley arrived together in the morning. Penn was on hand once again to take in Blake's revealing outfit, as were Ed Westwick and Taylor Momsen. Chace Crawford wasn't around to shoot, but it looks like his upcoming storyline will feature plenty of excitement regardless. View 15 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 To see more from the set, just . View 15 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Photo 9 Photo 10 Photo 11 Photo 12 Photo 13 Photo 14 Photo 15 Comments coaboytoy 6 years What is Leighton wearing? Looks less fashion-forward and more Forever 21! babaloo 6 years Her great body and sexy curves notwithstanding, that is one stupid looking top.