Here some of my favorites and I recommend all! =)

Tegan and Sara, Peaches, M.I.A. Ladytron, CSS, Yeah Yeah Yeahs, The Sounds, Shiny Toy Guns, Lady Sovereign, Le Tigre, Portishead, Crystal Castles, Gravy Train, The Knifes, New Young Pony Club, Chicks on Speed, Yelle, Uffie, No Doubt… sorry I have to throw in the best Female DJ in the world “Miss Kitten” !!!! (=