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Once you hear it, you can never un-hear it.
Behold, the greatest GIFs of the bombshell pop queen.
Plus: America gets its first Pizza ATM and Miles Teller crushes Jimmy Fallon in 'Slip and Flip.'
Perry's new song "Rise" honors Olympic athletes, as her feud with T-Swift rages on.
Everyone is freaking out about those Orlando Bloom pictures.
Admit it: You want to play.
With headliners Katy Perry, Bruno Mars, Diplo, and Fetty Wap, Vegas is kicking off 2016 with a bang.
I can't tell if this is really funny or really sad.
Sorry, Taylor Swift, check your balance...
Watch unearthed footage of a young Katy Perry singing backup for P.O.D.