Santigold!!!!! She only has only one album so far "Santogold", but it's amazing. I still listen to it alot after almost 2 years.
http://www.youtube.com/watch?v=kCeZzW54a2o
Also
M.I.A. her music is crazy. And so are her lyrics
http://www.youtube.com/watch?v=4iG4b9GKX9Q
Nelly Furtado's 2nd album "Folklore"
I know she's mainstream and all but her 2nd album is very different and the lyrics are really great. Too bad the album flopped in the states.
http://www.youtube.com/watch?v=ogHDTOUhmxQ
Dido - Her music isn't generic and she has a great voice. I recommend her album "No Angel".
http://www.youtube.com/watch?v=6qCt70ungb4
Or maybe
Duffy? She has great soul/pop/rock songs.
http://www.youtube.com/watch?v=HhZ5-L9znt8
Katie Melua - this girl has an amazing voice, this is my favorite song of hers, love the lyrics.
http://www.youtube.com/watch?v=z5lofPE01UI
Metric - my fav indie band.
http://www.youtube.com/watch?v=00KBHNy4kW4
Sorry, I got a bit carried away.. lol