The Haim Sisters from L.A. They don't have a record label, but the three sisters are very talented. I hope some label sign them soon. Danielle Haim (whom I think is the most talented of the 3), was part of Jenny Lewis' touring band last year. I saw them last July 4th in Battery Park, and Danielle was amazing. On different songs, Danielle either played the bass, lead or rhythm guitar, drums, organ and everything else, besides sing.
http://www.myspace.com/wearehaimThey were on tour with Julian Casablancas (The Strokes) earlier this year.