Best of 2009

Best Song: I Gotta Feeling

This was the year for the Black Eyed Peas. They spent more than six months at top of the Billboard charts, first for "Boom Boom Pow" and then for the hit single "I Gotta Feeling." The latter song even edged out Mariah Carey's "We Belong Together" for the longest number one stay of the decade. The party anthem even inspired a certain set of show producers to concoct...