Leighton Meester and Taylor Momsen of "Gossip Girl" at 2007 CW UpFront - After Party.Kevin Mazur/WireImage.com - Tuesday, January, 8, 2008, 12:8 AM

Leighton Meester arrives at the 11th Annual HELP Group Teddy Bear Ball at the Beverly Hilton.LRRB and Co./WireImage.com - Friday, January, 4, 2008, 9:4 PM

Leighton Meester at the T-Mobile Shadow Launch Party at the Bowery Hotel in New York City.Theo Wargo/WireImage.com - Friday, January, 4, 2008, 9:4 PM

Leighton Meester arrives at "Gossip Girl" premiere party at TenJune.Larry Busacca/WireImage.com - Friday, January, 4, 2008, 9:4 PM

Leighton Meester arrives at The CW TCA Party held at the Pacific Design Center.Mark Sullivan/WireImage.com - Friday, January, 4, 2008, 9:4 PM

Leighton Meester attends the 2007-2008 New York City Ballet Opening Night Gala.Jamie McCarthy/WireImage.com - Friday, January, 4, 2008, 9:4 PM

Leighton Meester and actress Blake Lively from "Gossip Girl" at MTV's TRL.Stephen Lovekin/WireImage.com - Friday, January, 4, 2008, 9:4 PM

Leighton Meester stars as Blair Waldorf in Gossip Girl.The CW/Andrew Eccles - Wednesday, August, 1, 2007, 9:1 PM

Leighton Meester of Gossip Girl at the 2007 Los Angeles Film Festival - "The Beautiful Ordinary" Screening.Jesse Grant/WireImage.com - Wednesday, August, 29, 2007, 12:29 AM

Leighton Meester of Gossip Girl at the Women In Film Presents The 2007 Crystal and Lucy Awards.Jeffrey Mayer/WireImage.com - Wednesday, August, 29, 2007, 12:29 AM

Leighton Meester is bringing bitchy back as Blair Waldorf, one half of the Serena/Blair duo in ytvshow id=40313]Gossip Girl[/ytvshow]. Meester has popped up before in 24, Veronica Mars, and 7th Heaven, but this is her chance to shine in a leading role. Blair is willing to do anything to get what she wants, and that includes stepping all over her “friends” in the process. Albert L. Ortega/WireImage.com - Wednesday, August, 29, 2007, 12:29 AM

Leighton Meester of Gossip Girl at the "Man of the Year" World Premiere.Gregg DeGuire/WireImage.com - Wednesday, August, 29, 2007, 12:29 AM