Karlienne is the first one to come to mind since I found her on Youtube through her fan songs, but I've purchased every one of her albums.

Right now, I'm listening to a lot of metal. A new favorite group is Gloryhammer. I've already ordered one of their albums with some leftover birthday money. Also becoming fond of Van Canto (metal without guitar, who knew it was possible?), Ancient Bards, and Alestorm.