I know she's probably just pop but...
 

Fiona Apple is awesome.

I'm not a fan of Criminal, but Across the Universe is pleasant.

Honestly though, I haven't heard much of her ****. However, her song 'Not About Love' is AWESOME. The lyrics, her tones, hmm, even the video...

I've been listening to it atleast 10 times a day for the last week. lol, and I don't usually do that with songs.