The Katy Perry Wiki

Kara Elizabeth DioGuardi (born December 9, 1970) is an American singer-songwriter, record producer, music publisher, A&R executive, composer and TV personality. She appeared as a judge on the eighth and ninth seasons of American Idol; Perry appeared alongside her as a guest judge in the latter.

Work with Katy Perry[]

She worked with Katy Perry on the following songs:

Songs from (A) Katy Perry (2005):

Songs currently unreleased: