When it comes to celebrity power, few can touch pop star Katy Perry. However, Kitty Purry, Katy's pet cat, comes within a whisker or two -- at least on Twitter.

After Katy tweeted a photo of the fluffy grey feline ... online interest in the kitty roared, and the photo quickly went viral. The term "kitty purry" became one of the hottest topics on Twitter. Comments on the photo ranged from "a-dor-able" to "awww" to "kitty purry LOL".

Kitty Purry isn't Katy's only pet cat. She and husband Russell Brand also look after Morrissey (named after the Smiths singer, of course) and Krusty (apparently "a combination of the pop star’s name and the comedian’s nickname 'Rusty'"). Lest you continue to doubt Katy's obession with cats, don't forget that she named her fragrance "Purr."

Not every celeb in Hollywood has a pet, but those who do tend to give their furry companions unique names. Adam Sandler has a bulldog named Matzoball. Christina Ricci has a pup named Sheriff Steve Goldburg. And, perhaps most bizarrely, Jennifer Garner and Ben Affleck share custody of a Labrador named (drumroll please) Martha Stewart.

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