Break out your backwards oversized gear, because the rap duo Kris Kross are all growed up and ready to jump jump back into the spotlight. Hard to believe it's been 21 years since Chris "Mac Daddy" Kelly and Chris "Daddy Mac" Smith became famous with there smash hit "Jump". They've just announced they are reuniting for a 20th anniversary all-star concert honoring So So Def Recordings in Atlanta next month.

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