Ahead of the final Canadian stop of her Lifetimes Tour, Katy Perry shared a picture of a bloody knee injury she sustained while performing on stage.

Since 2017, we've been talking with Katy Perry, Luke Bryan and Lionel Richie about "American Idol," for what's now the seventh season.

Katy Perry, Psy, Iggy Azalea, Josh Groban and more read mean (but hilarious) tweets about themselves. For the second time, all the stars in the video are known for their work in the music industry.

A scary moment during Katy Perry's recent concert in Detroit as a fan collapsed on stage during the duet segment of the show. Perry brought her The Lifetimes Tour to Little Caesars Arena Sunday ...