Jukebox Hits: No.1 R&B Songs of the '00s, Vol. 1

With huge hooks, unforgettable collaborations, and irrepressible beats, ‘00s R&B ruled equally over the radio and the club. Mariah Carey and Usher turned out lusty efforts that assured us that they were all grown up, Beyoncé and Justin Timberlake went solo and confidently shattered expectations, and rising stars like Chris Brown and Akon fully cemented their legacies.