Paris Hilton partying with Kris Jenner kicks off #ThrowbackThursday.
Paris Hilton took us back to her 21st birthday where she partied with "cool mom" Kris Jenner.
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Meanwhile, Reese Witherspoon took us back to the early '80s by sharing this photo of herself in a party dress while posing on a John Deere lawnmower.
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Apparently Madonna once partied with dance legend, Martha Graham.
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Mario Lopez once worked the A.C. Slater realness at his senior dance.
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