I'll admit it: I just turned 30, which puts me a little outside the intended audience for the CW's newest teen drama, Gossip Girl , which launches tonight on the netlet at 9 pm ET/PT. That said, I was completely hooked on the early seasons of The OC , which is probably a good thing as Gossip Girl , based on the ever popular line of novels, comes from showrunners Josh Schwartz and Stephanie Savage. Before you ask, yes, that is Veronica Mars ' Kristen Bell lending her voice as the eponymous Gossip Girl, a sort of Perez Hilton for the Noxzema and Marc Jacobs crowd, who dishes out dirt on the Upper East Side denizens via her popular website. Into her withering gaze comes former It Girl Serena van der Woodsen (Blake Lively), who fled Manhattan following a mysterious incident, and has now returned home after time at boarding school. Her return to the rarefied world of upper crust Manhattan causes turmoil of all kinds, especially towards her former best friend Blair Waldorf (Leigh