Don’t believe the hype. Gossip Girl baddie Blake Lively says she’s actually an overachieving good girl off screen, she reveals in the all-new September issue of Cosmopolitan Magazine.

“I’ve kissed just three people, other than stuff I’ve done for TV or movies,” the 20-year-old actress, who plays Serena van der Woodsen on the smash CW series, says in the September 2008 issue of Cosmo. “I know — I’m weird.”