Although Katy Perry is best-known for frothy, off-the-walls pop music, the Billboard Hot 100 topper opened her Thursday (Jan.

American Idol alum Katy Perry shared her thoughts on past winner Carrie Underwood replacing her as judge on the singing competition series, which airs March 9 on ABC.

LOS ANGELES, CALIFORNIA: Katy Perry may have left ' American Idol ' after seven seasons, but her bond with former co-judges Luke Bryan and Lionel Richie remains strong. During an appearance on 'Jimmy ...

Katy Perry is leaving American Idol in good hands. After the "Dark Horse" singer announced that season 22 of the singing ...