Popular Female Singers in the past 2 decades


Hi, can you name 10 most popular/favorite female singers (vocalist, artist) in the past 2 decades?

I want to collect the CDs for these singers and very often I heard those songs (mostly pop, movie theme sound track, etc) on radio FM103.5 or 107.9. But I don't remember or recognize their names or the songs.

Celine Dion and Britney Spears are just 2 examples. Thanks.
r0817
Eva Cassidy Live at Blues Alley
Madeline Peyroux Dreamland
Patty Griffin Children Running Through
Eva Cassidy Live at Blues Alley
Jane Monheit Over the Rainbow
Few more favorites I need to mention:
Ricky Lee Jones
Carly Simon
Carol King
Pat Benatar
Ann and Nancy Wilson
Sara Bareilles
Gloria Estephan
Natalie Merchant
Anita O'Day
Uta Lemper
Lisa Stansfield
Diane Schurr
Maybe I should add (trying not to be redundant):

Joni Mitchell
Byork
Annie Lennox
Cyndi Lauper
Madonna
Whitney Houston
Sinead O'Connor
Laurie Anderson
Diane Krall
Amy Winehouse

Can't say I listen to all of these ladies, but you wanted popular, no?
Jane Siberry - When I Was A Boy
Ani Difranco - Up Up Up Up Up
Tori Amos - Little Earthquakes
I see Bjork finally mentioned above. I recommend her album titled Serpentine or Debut.