Michelle Branch as Lesley Gore ''You Don't Own Me'' Branch is one of the few musicians with lines. Big mistake. She acts worse than she sings. C-
Usher as Marvin Gaye ''Can I Get a Witness'' Usher's stated obsession with Gaye pays off: He's got the singer's smile, tilted head, and boundless energy. A-
Ashanti as Dionne Warwick ''Walk On By'' The pride of Murder Inc. conveys the Motown era's stilted stage moves, but she can't carry Warwick's tune. C --
B2K as The Temptations ''My Girl'' The hip-hop boy band turns in a surprisingly faithful, nuanced rendition, with black-rim specs and laughable wigs. B
India.Arie as Nina Simone ''Come Ye'' Arie doesn't sound like Simone, but when it's this good, who cares? And Arie's bothered swagger is dead-on. A --
LeAnn Rimes as Connie Francis ''Where the Boys Are'' Rimes is the perfect belter to channel Francis, in all her glass-shattering glory. B+
Duncan Sheik as Bobby Darin ''Beyond the Sea'' As the lounge-y singer, Sheik is dull. C As the arrogant backstage jerk, he's a genius. A
Nick Carter as Jay of Jay and the Americans ''Come a Little Bit Closer'' It may seem impossible, but Carter is even dorkier than the '60s crooner. C
Wayne Brady as Jackie Wilson ''Baby Workout'' No surprise that the only TV regular here does the best acting -- but he's also a great singer. B+
Vanessa Carlton as Dusty Springfield ''Wishin' and Hopin''' Carlton brings a bit too much of her swinging hips and vocal tricks to the part. B --
Vivian Green as Brenda Halloway ''Every Little Bit Hurts'' The little-known soul siren (and Jill Scott backup singer) nails Halloway's allure. A --
Third Eye Blind as the Kinks ''All Day and All of the Night'' The rockers capture none of the Kinks' energy and, for that matter, few of their notes. D
