Rihanna

When Rihanna grabbed the summer of 2005 by the eardrums with the Caribbean-spiced heat of "Pon De Replay," whispers of one-hit wonderdom trailed in her wake — but not for long. Without missing a beat, the Barbados-born beauty followed up her breakout smash with yet another chart-seizer, then another, then . . . well, you get the picture. So while one moment saw Rihanna matching wits and tongue-twisting gymnastics with dance hall monarch Sean Paul on "Break It Off," the next found her making an irresistible dance-floor plea on the rock-steady mover "SOS." When you download our Rihanna Essentials, you get only the best of the newly minted diva, whether she's firing up for a fight on "Breakin' Dishes" or issuing a sweet siren's call to stand under her "Umbrella."