Weezer's Rivers Cuomo Explains 'Spontaneous' Leighton Meester Duet

Frontman says band was inspired by Hootenanny Tour to work with other artists like Lil Wayne and Katy Perry. By Kyle Anderson Weezer's Rivers Cuomo performs at Hammerstein Ballroom on October 31, 2009 in New York City Photo: Ben Hider/ Getty Images On Saturday night, Weezer celebrated Halloween with a concert at New York's Hammerstein Ballroom. It was your typical Weezer show, full of big hooks and lung-busting sing-alongs, but when it came time for the group to play new single "(If You're Wondering If I Want You To) I Want You To," they welcomed a special guest onstage: "Gossip Girl" star and "Good Girls Go Bad" singer Leighton Meester . She stormed the stage and duetted with Cuomo on the song, which sounded extremely polished but was mostly off-the-cuff. "We invited her down, and she was in rehearsal — wait, did she even come to rehearsal? No, she didn't!" Cuomo told MTV News, trying to recollect how the events shook out. "We just worked on it in ... (link)