Blake Lively LOVES That She's Starring In A Box Office Hit

Or she's just grinning because she gets to wear that fab outfit on the Gossip Girl set!

Blake Lively, who's currently starring in the Ben Affleck flick The Town in theaters, appeared absolutely ecstatic yesterday in New York while filming her hit TV show. You know Leighton is all annoyed that Blake is a movie star for a week - you know it!