Katy Perry shares hilarious behind the scene snaps flashing her pants in a mermaid tail

Katy Perry suffers hilarious American Idol blunder as she falls off chair in Ariel costume

Katy Perry Reveals How She Squeezed Into Ariel Costume for 'Idol' Disney Night (Video)

Katy Perry Dishes on Elaborate 'Little Mermaid' Costume She Wore for 'American Idol' Disney Night (Exclusive)