From left: Lionel Richie, Katy Perry, Ryan Seacrest and Luke Bryan on the set of "American Idol."
From left: Lionel Richie, Katy Perry, Ryan Seacrest and Luke Bryan on the set of "American Idol." Eric Liebowitz ABC via AP
From left: Lionel Richie, Katy Perry, Ryan Seacrest and Luke Bryan on the set of "American Idol." Eric Liebowitz ABC via AP