Katy Perry - Birthday (Lyric Video)

Get "Birthday" from Katy Perry's 'PRISM': http://katy.to/PRISM WITNESS: The Tour tickets available now! https://www.katyperry.com/tour Lyric video for Katy Perry’s “Birthday” from ‘PRISM’ produced by Mandy Sellick and directed by Aya Tanimura. Follow Katy: http://www.katyperry.com http://youtube.com/katyperry http://twitter.com/katyperry http://facebook.com/katyperry http://instagram.com/katyperry Music video by Katy Perry performing Birt

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