LMFAO have ended 2011 on top of the pop charts after spending seven weeks stuck at number two.
 
The duo has toppled Rihanna with their "Sexy and I Know It" hit thanks to massive digital sales over Christmas.
 
Rihanna's "We Found Love" drops to two on the new Hot 100 chart, while Katy Perry's "The One That Got Away" rises two spots to three.

Bruno Mars' "It Will Rain" and Jay-Z and Kanye West's "N**gas in Paris" round out the last countdown of the year.