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Less than five percent, probably. Most rock bands don't have female singers. I have a couple of Janis Joplin albums, Natalie Merchant, 4 Non-Blondes, some bluegrass, some new agey stuff, and that's about it. I like women's voices as much as mens, it's just that almost all rock bands, whether I like them or not, have a male singer. Most female singers do singer-songwriter kinds of stuff which I don't care for that much. I like instrumental stuff more than singing anyway.
 
Hmm. 16(ish)% of my music (arranged by artists) has a female singer. That's 40 groups out of 249 artists. Then again, 500(ish) of my songs are sung by women, out of 1765 songs, so that takes the females up to around 30% of my music. But if you consider the percentage of female-sung songs in my top rated and most played songs, it's closer to 50% :)
 
I can't even to begin to fathem how many artists/groups feature femal vocalists. 30-40%? I don't really know. Can I also include certain CBC Radio 3 podcasts ;)

The main ones that I know of the best are: bjork, le tigre, bikini kill, tegan and sara, ambulette, anna oxygen, asobi seksu, beangrowers, be your own pet, bedtime for toys, bratmobile, broen social scene, butchies, the arcade fire, a suny day in glasgow, the kindness kind, the knife, persephone's bees, paris motel, boyskout, css, tralala, controller.controller, the diaboliks, the fitness, architecture in helsinki, the hot springs, hot hot heat, amy correia, m.i.a., noisettes, visqueen, new pornographers, pretty girls make graves, schoolyard heroes, sara hepburn, shinny toy guns, camille, the carrots, el perro del mar, metric, the trucks, surferosa, the reputation, magneta lane, prototypes, the soviettes, ursula 1000, sleater kinney, excuse 17, pony up!, the muffs, stereo total, the catch, cirque du soleil, the gossip, the hangovers, gravy train!!!, immaculate machine, kleenex/liliput, kristin allen-zito, mates of state, the charlets, the organ, the von bondies, bangs, cibo matto, garbage, the fading collection, hole, mon frere, smoosh, thee emergency, tracy + the plastics, yeah yeah yeahs, butchies, the donnas, mocket, sugarcubes, lederhosen lucil, and plenty more.
 
Out of 414 artists:

Aaliyah, ABBA, Abigail Washburn, The Ailerons, Aimee Mann, Air, Akala & Niara, Alicia Keys, Amy Winehouse, Anaïs, Ane Brun, Annie, Arcade Fire, Bat For Lashes, The Be Good Tanyas, Be Your Own Pet, Belle and Sebastian, Beth Orton, Beyonce Knowles, Björk, Blondie, The Breeders, Bugz in the Attic, Camille, Carole King, Cass Fox, Christina Aguilera, Colbie Caillat, The Concretes, Corrine Bailey Rae, CSS, Deee-Lite, Deep Dish, Diana Krall, Duke Special, Elin Sigvardsson, Ella Fitzgerald, Emily Spiller, Erykah Badu, Estelle, Feist, Fried, Girls Aloud, The Go! Team, The Gossip, Groove Armada, Heather Nova, Hem, The Hot Puppies, Isobel Campbell & Mark Lanegan, Jenny Lewis & The Watson Twins, Joan As Police Woman, Jolie Holland, Juliet, Justine Electra, Kate Nash, Kate Walsh, Kathryn Williams, Kylie Minogue, Laura, Laura Marling, Lauren Laverne, Lily Allen, Lisa Loeb & Nine Stories, Lisa Hannigan (Damien Rice), Low, Madeleine Peyroux, Madita, The Magic Numbers, Mahalia Jackson, Mariah Carey, Martha Wainwright, Mason vs Princess Superstar, Morcheeba, New Young Pony Club, Nicole Willis & The Soul Investigators, Nikola Rachelle, Nina Simone, Norah Jones, Nouvelle Vague, Orly Chap, PJ Harvey, Polly Paulusma, Portishead, The Puppini Sisters, Regina Spektor, Rihanna, Rogue Traders, Saint Etienne, Sarabeth Tucek, Sarah McLachlan, Shakira, Shea Seger, Shelley Poole, Sheryl Crow, Sol Seppy, Sophie Solomon, The Source featuring Candi Staton, St. Vincent, Stars, Sugababes, Tina Dico, TLC, The Tommys, Webb Sisters, The White Stripes, Yeah Yeah Yeahs, Zero 7.


I make that out to be around 25% of my iTunes library?
 
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