My top:
1. Lady Sovereign xD (I love her)
2. Natasha Bedingfield
3. Dido
4. Joss Stone
5. Jem
6. Charlotte Church
7. KT Tunstall
8. Lily Allen
9. M.I.A.
10. Corinne Bailey Rae
11. Victoria Beckham
Lisa Stansfield. I just got my hands on "Affection" and it's quite the album. Dusty Springfield, Siouxsie Sioux, Mutya Buena, Cathy Dennis, PJ Harvey, Gabrielle, Sophie Ellis-Bextor, Natasha Bedingfield, Caron Wheeler, & KT Tunstall are all great singers in their own right as well.