The year in music
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Rihanna( Matt Hartman / Los Angeles Times )
"Good Girl Gone Bad" (Def Jam)
Born in Barbados, this 21-year-old powerhouse ingénue is a force behind the current Caribbeanization of R&B, and the strongest young rival for Beyoncé's crown. Rihanna's third album is mostly known for "Umbrella," a wistful, sneakily affecting hit that ruled the charts all summer. But as her curtain-ripping turns at this year's MTV Video Music Awards proved, there's much more to this singer than one sexy hook. More hits are bound to extend this album's shelf life.