Katy Perry Calls Herself as 'Legolas' GF' as She Dresses as Tinkerbell for 'American Idol's' Disney Night

American Idol: Katy Perry goes all out as Tinkerbell with wings and pixie dust for Disney Night

Chris Martin set to take part in American Idol's Coldplay-themed show as a mentor

‘American Idol’ Recap: The Top 7 Are Revealed & 3 Great Singers Are Eliminated