'American Idol': Katy Perry, Luke Bryan and Lionel Richie to Return for Season 21

Katy Perry keeps cuts a casual figure as she visits a park in Beverly Hills with her daughter Daisy

'American Idol' Judges Ranked By Who Appeared on the Most Seasons (Including Several Judges You Probably Forgot About!)

The Richest 'American Idol' Judges Ranked from Lowest to Highest (& the Wealthiest Has a Net Worth of $450 Million!)