I have heard from another parent that the little girls (yes R and Y1) in the school she is going to start in September are into JLS and One Direction 
The things we play at home which she likes, apart from nursery rhymes, are the Vaccines (yay), Hugh Laurie (ho hum, DH's music), and Duran Duran 
I have tried bands with female singers and she doesn't like them (liked a few Garbage songs, that's all). But my music collection is not extensive and mostly consists of 90s grunge.
Please please please can someone recommend something that she may like, that she can play to school friends in a year or so to FIGHT the JLS/1D takeover?
If you can think of anything with a female singer you get extra points 
Thank you.