Mark the singers you like with (+) or (♥), mark the rest with (–) or (♣).

– Grace Slick (Jefferson Airplane)
– Nico (Nico)
– Diamanda Galas (Diamanda Galas)
– Hope Nicholls (Fetchin Bones)
♥ Enya (Enya)
– Janis Joplin (Janis Joplin)
– Patti Smith (Patti Smith)
– Mary Margaret O’Hara (Mary Margaret O’Hara)
♥ Bjork (Bjork)
– Kat Bjelland (Babes In Toyland)
– Elizabeth Frazer (Cocteau Twins)
– Laura Nyro (Laura Nyro)
– Mia Zapata (Gits)
♥ Sinead O’Connor
– Exene Cervenka (X)
– Phoebe Snow
– Joni Mitchell (Joni Mitchell)
– Loreena McKennitt
– Anna Homler

– Azita Youssefi (Scissor Girls)
– Eleanor Friedberger (Fiery Furnaces)
– Muffin Spencere (Brassy)
– Neko Case
– Karen Lee Orzelek
– Anneli Marian Drecker (Bel Canto)
♥ Lisa Gerrard (Dead Can Dance)
♥ Tori Amos
– Natalie Merchant (10,000 Maniacs)
– Carrie Akre (Hammerbox, Goodness)
– Gilly Smyth (Gong)
– Mimi Goose (Hugo Largo)
– Leslie Rankine (Silverfish, Ruby)
– Thalia Zedek (Live Skull)
– Dagmar Krause (Art Bears)
– Tina Turner
– Nina Hagen
– Lynda Stipe (Hetch Hetchy)
♥ Delores O’Riordan (Cranberries)
– Rickie Lee Jones
– Sarah Shannon (Velocity Girl)
– Tara Key (Antietam)
– Madonna
– Polly Harvey
– Annette Peacock
– Jennifer Charles (Elysian Fields)
– Fiona Apple
– Terry Garthwaite
– Margo Timmins (Cowboy Junkies)
♥ Beth Gibbons (Portishead)
– Mary Chapin Carpenter
– Agnetha Faltskog (Abba)
– Liz Phair
– Kim Carnes
– Joan Armatrading
– Bonnie Raitt
– Poly Styrene (X Ray Spex)
– Lydia Lunch
– Linda Ronstadt
– Melissa Etheridge
– Sheila Chandra
– Harriet Wheeler (Sundays)
– Joan Jett
– Neneh Cherry
– Sarah Cracknell (Saint Etienne)
– Nanci Griffith
– Emmylou Harris
– Chrissie Hynde (Pretenders)
♥ Courtney Love (Hole)
– Gloria Gaynour
– Grace Jones
– Jarboe (Swans)
– Kate Pierson (B52’s)
– Tanya Donelly (Belly)
– Ani Di Franco
– Hope Sandoval (Mazzy Star)
– Thelma Houston
– Sandy Denny
– Nina Gordon (Veruca Salt)
– Kate Bush
– Anneli Marian Drecker (Bel Canto)
♥ Sade
♥ Shirley Manson (Garbage)
– Lida Husik
– Carla Torgeson (Walkabouts)
– Mimi Goese (Hugo Largo)
– Natacha Atlas (Transglobal Underground)
– Amy Denio (Tone Dogs)
– Jane Siberry
– Jennifer Herrema (Royal Trux)
– Laetitia “Seaya” Sadier (Stereolab)
– Stevie Nicks (Fleetwood Mac)
♥ Nina Persson (Cardigans)
– Whitney Houston
– Diana Ross (Supremes)
– Skin (Skunk Anansie)
– Lauryn Hill
– Suzanne Vega
– Joan Baez
– Donna Summer
– Naomi Yang (Damon & Naomi)
– Kelly Hogan (Jody Grind)
– Georgia Hubley (Yo La Tengo)
– Wanda Jackson
– Darlene Love (Crystals)
– Kristen Hersh (Throwing Muses)
– Siouxsie Sioux
– Carole King
– Maria McKee
– Isabel Monteiro (Drugstore)
– Mariah Carey
♥ Annie Lennox
– Maria Azevedo (Battery)
– Martha Reeves
– Amelia Fletcher (Heavenly)
– Mary Weiss (Shangri-las)
– Agnetha Asa Faltskog (Abba)
– Louise Rhodes (Lamb)
– Dusty Springfield
♥ Sheryl Crow
– Bonnie Tyler
– Sheena Easton
– Celine Dion

The list taken from scaruffi.com.
Feel free to add singers that you do not see in the list.