Music News LMFAO's 'Sexy and I Know It' tops singles chart, Rihanna second 01/05/2012 LMFAO's "Sexy and I Know It" is No. 1 on the U.S. record chart for a second week, Billboard.com reported Thursday. Read More RELATED NEWS Jimmy Fallon's 'The Tonight Show' dropping to only four nights a weekAshley Tisdale announces birth of her second childSelena Gomez is a billionaire TAGS: Adam Levine Kanye West Katy Perry Bruno Mars Rihanna Calvin Harris Adele Flo Rida Someone Like You
