Song driving me crazy! (Forever 21 song)

This evening there was a song playing in Forever 21 that sounded alot like Lady
Sovereign. It was a very random sounding song. I looked up her songs and coudln't find it. Anyone know some artists who sound simular to her?

m.i.A. - paper planes?

Kate Nash - Mouthwash

i think it's creator by santogold??