Which Katy Perry No. 1 Hit Is Your Favorite?
"Last Friday Night (T.G.I.F.)"
"Roar"
"Part Of Me"
"Dark Horse" feat. Juicy J
"I Kissed A Girl"
"E.T." feat. Kanye West
"Teenage Dream"
"Firework"
"California Gurls" feat. Snoop Dogg
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