KE$HA's TIK TOK hit was the world's biggest selling digital single in 2010. According to International Federation of the Phonographic Industry (IFPI) officials, the party anthem sold 12.8 million copies. Lady Gaga's Poker Face was second with 9.8 million downloads and Eminem and Rihanna's Love the Way You Lie was third.
The day Michelle elected Barack as her future husband.
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