Karen O is a pseudonym of Karen Lee Orzolek (b. 22 Nov 1978 in South Korea), lead vocalist with the Yeah Yeah Yeahs and Karen O and the Kids.

Her mother is Korean and father is Polish. She grew up in New Jersey, went to Dwight-Englewood high school, and attended Oberlin College, but transferred to New York University’s Tisch School of the Arts.

Orzolek has been noted for her sense of fashion. All of her costumes are designed by fashion designer and friend Christian Joy.