1. Michelle Branch as Lesley Gore
2. Usher as Marvin Gaye
3. Jason Mraz as Dion DiMucci
4. Ashanti as Dionne Warwick
5. Kelly Clarkson as Brenda Lee
6. Jennifer Love Hewitt as Nancy Sinatra
7. Third Eye Blind as The Kinks
8. Kelly Rowland as Martha Reeves of Martha and the Vandellas
9. Lil' Kim as Shirley Ellis
10. Nick Lachey as Tom Jones
11. LeAnn Rimes as Connie Francis
12. Bonnie McKee as Janis Joplin
13. JoJo as Linda Ronstadt
14. Nick Carter as Jay from Jay and the Americans.
15. Wayne Brady as Jackie Wilson
16. Hilary and Haylie Duff as The Shangri-Las
17. Annddd Paris Hilton as Barbara Eden
18.
*On a separate note...if someone knows how I can get my hands on the series epilogue that never aired...that would be greatttt.