She’s got a rockin’ body, a rockin’ job as the mean queen B and now Leighton Meester is a true rocker chick. Leighton joined Weezer frontman Rivers Cuomo on stage on Halloween at the Hammerstein Ballroom in New York City. The two sang Weezer’s first single (If You’re Wondering if I Want You To) I Want You To and were joined by Nat Wolff of the Naked Brothers Band on guitar.

PHOTO: Leighton Rocks A Bikini On The Beach In California

• TAGS

• Blake Lively
• Chase Crawford
• Ed Westwick
• Leighton Meester
• Naked Brothers Band
• Nat Wolff
• Rivers Cuomo
• Weezer