LISBON, PORTUGAL (ET/CBS) – 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 hitting San Bruno’s You Tube.

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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.

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Mark your calendars, Katy Perry will be in the Bay Area for her California Dreams Tour on Friday August, 12th at the HP Pavilion. Tickets are now on sale. Click here for details.

Katy’s best friend, Rihanna is currently on her ‘Loud Tour’. Her Bay Area stop will be at the Oracle Arena in Oakland on Thursday, June 30th. Click here for details.

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