Article Photos: The top 10 songs and albums on the iTunes Store

FILE- In this Friday, Dec. 9, 2011 file photo shows singer RedFoo, center, and LMFAO as they perform at Z100's Jingle Ball concert at Madison Square Garden in New York. (AP Photo/Evan Agostini, File)

FILE- In this Friday, Dec. 9, 2011 file photo shows singer RedFoo, center, and LMFAO as they perform at Z100's Jingle Ball concert at Madison Square Garden in New York. (AP Photo/Evan Agostini, File)