Originally appeared on E! Online You’re gonna hear Katy Perry roar about her latest milestone. After selling out Madison Square Garden during the Aug. 11 stop on her ...

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.