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Karen O is set to make her Oscar debut this weekend.  The Yeah Yeah Yeahs frontwoman will perform her Best Original Song nominee "The Moon Song" at Sunday's Academy Awards.  The track comes from co-writer Spike Jonze's film Her, which also brought Arcade Fire member Will Butler and Owen Pallett a nod for Best Original Score. 

Sunday's ceremony will also include performances of the other Best Original Song nominees -- U2's "Ordinary Love" from Mandela: Long Walk to Freedom, Pharrell Williams' "Happy" from Despicable 2, and Idina Menzel's "Let It Go" from Frozen.  

Coverage of the 86th Academy Awards starts at 7:00 p.m. Eastern on ABC. Don't miss it! Get all your updates here.

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