'American Idol' says bye to Katy Perry as it crowns winner :

Katy Perry capped off her seven seasons as a judge on "American Idol" with an emotional performance.

Related Keywords

Santa Fe High School , Texas , United States , American , America , Noah Thompson , Jimmy Kimmel , Trey Louis , Lionel Richie , Katy Perry , Luke Bryan , Chayce Beckham , Sara Beth Liebe , Abi Carter , Katie Perry , Twitter , American Idol ,