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Electric duo LMFAO -- made up of Redfoo and Sky Blu -- stormed the music charts with their hit songs "Party Rock Anthem" and "Sexy And I Know It" back in 2009.

In 2012, they went their separate ways to focus on solo careers -- and have yet to reunite for a PARTY!

"Party rock is in the house tonight. Everybody just have a good time. And we gon' make you lose your mind. We just wanna see you, Shake that!"

Guess what they look like now!

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