To say 2011 has been a big year for LMFAO is an understatement. They released their second album, Sorry for Party Rocking, in June, and from that album came the fist-pumping megahit [article id="1670146"]"Party Rock Anthem."[/article] The #1 song, from the electro-pop duo of Redfoo and SkyBlu, got all music genres (and dancing hamsters) to band together for some excessive party rocking.

"Party Rock Anthem" achieved serious success in 2011, staying at the top of the Billboard Hot 100 for six straight weeks and becoming the seventh song to spend at least 25 weeks in the top 10. It also came in at the #2 for the best-selling single of the year on iTunes, topped only by Adele's "Rolling in the Deep."

The video for "Party Rock Anthem" caused a movement all its own, showing everyone how to shuffle and garnering more than 314 million YouTube views. Now they're outdoing themselves with their latest single, [article id="1671012"]"Sexy and I Know It,"[/article] which has reached #1 on the iTunes chart.

MTV News caught up with Redfoo at [article id="1675741"]Z100's Jingle Ball concert[/article] on Friday, and he explained how the success of their chart-topping single has had such an impact on their career.

"I think it just brought us into the households via the video, and it just got everybody more into dance music, because now they can shuffle, and so it was just a big thing." Redfoo said. "I think for some of the critics, being #1 for six weeks in a row on the Billboard, people said, 'Now this is a real thing.' "

LMFAO don't seem to be slowing down anytime soon. They will ring in the new year along with Lady Gaga, Justin Bieber and Nicki Minaj in New York's Times Square for the 40th annual [article id="1675506"]"Dick Clark's New Year's Rockin' Eve."[/article]

What did you think of LMFAO's big year? Let us know in the comments!