The 35-year-old singer was joined on the red carpet by her hubby Barnaby Clay.
“moon song rising on #Oscars soon!” Karen‘s band the Yeah Yeah Yeahs tweeted earlier.
During the show, Karen took the stage with Vampire Weekend‘s Ezra Koenig to perform “The Moon Song,” which she wrote for the film Her. She’s up for Best Original Song. Good luck, Karen!
Watch her performance of “The Moon Song” below!
Karen O Performs “The Moon Song” at Oscars 2014
FYI: Karen is wearing a Camilla Staerk dress and Sophia Webster heels.