Leighton Meester Gets Totally Pumped

Goodness, it looks like Leighton Meester was feeling a little gassy on Friday.

The Gossip Girl enchantress, rocking her new blonde hairdo, hit the pumps on the set of her upcoming movie The Roommate in Los Angeles.

In the film—which costars Twilight star and new dad Cam Gigandet—Meester plays Sara, a college student whose mentally unstable roommate becomes obsessed with her.

Sounds like a role that Meester can really sink her teeth into.