All of Katy Perry's greatest hits! Greatest Hits, Greatest, Best of, Charts, Katy Perry, 00s, 10s, 20s, Spotify, Katy, Perry, I Kissed A Girl, Firework, Last Friday Night, Roar, Dark Horse, When I'm gone, Teenage Dream, Hot N Cold, California gurls, E.T, Unconditionally, Prism, Witness, Smile, 2022,