Favorite Vocalists

I'm a big music fan, as you all know, and one thing that i look for is a great voice, something special that makes it different and unique, i've chosen my 30 (i couldn't make it smaller) favorite vocalists of all time, here they are:
Alanis Morissette
Annie Lennox
Courtney Love
Tori Amos
Barbra Streisand
Rihanna
Lauryn Hill
Cat Power
Celine Dion
Kelis
Prince
PJ Harvey
Beth Ditto (Gossip)
Karen O (Yeah Yeah Yeahs)
Sinéad O'Connor
Marilyn Manson
Adele
Nina Simone
Elton John
Florence Welch (Florence + The Machine)
Thom Yorke (Radiohead)
Sia
Steve Perry (Journey)
Pink
Andrew Wyatt (Miike Snow)
Tina Turner
Shirley Manson (Garbage)
Britney Spears
Alicia Keys