Katy Perry launched her California Dreams Tour in Europe on Sunday in Lisbon, Portugal and the singer expanded her normal stage repertoire in a new viral video.
Paying homage to some of her showbiz friends, Katy sang Rihanna's "Only Girl (In The World)," Jay-Z's "Big Pimpin'" and Willow Smith's "Whip My Hair" in her own one-of-a-kind style.
Last week, Katy released her newest single "E.T." featuring Kanye West. Her last album Teenage Dream is out now.