R Kelly December 27, 2007

In the early '90s he declared there wasn't nothin' wrong with a little 'Bump and Grind,' and he later experienced crossover success with 'I Believe I Can Fly,' a Grammy-winning effort for the master of slow jams. Now humbled by run-ins with the law, Kelly has toned down his rauchy vibe, just a bit, for his latest offering, 'Double Up.' The set, which has since been certified platinum by the Recording Industry Association of America, has spawned the hits 'I'm A Flirt,' 'Rock Star' featuring Ludacris and Kid Rock, and 'Same Girl,' a duet with Usher. Keyshia Cole is an urban songstresses with a golden soprano voice. She knew the streets, and that inner-city viewpoint informs many of her songs, which are generally a bit rougher and less naive than those of your typical young female urban vocalist.