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Former day trader RedFoo and his nephew SkyBlu make up the twosome LMFAO. They hit it big last year with their insidiously catchy singles "Party Rock Anthem" and "Sexy and I Know It." In the video for the latter song, the pair dance in Speedos and sing about wiggling. Tasteless and hugely popular, it spawned parodies by everyone from Elmo to Bruce Springsteen. (Thankfully, the Boss did not don a Speedo.)
Head on over to the Time website to vote to include LMFAO in The 2012 Time 100.