Blake Lively: Peek-A-Boob!

Blake Lively lets the girls out to play while shooting a scene with new Gossip Girl star Sam Page in New York City on Tuesday afternoon (August 31).

The 22-year-old actress, who wore a sexy peek-a-boob top, locked arms with Sam and played his new love interest. Sam‘s first episode is expected to air in October.

The fourth season of Gossip Girl kicks off on Sept. 13 on The CW!

Leighton Meester is looking super cute too!

FYI: Blake carried a Kotur clutch.

10+ pictures inside of Blake Lively‘s peek-a-boob…