Um my vote goes to "Wing." Have you ever herd her lol im laughing right now typing cuz she sucks so bad it is hilarious. If your a south park fan then you should know who Wing is. If you know who she is and you don't watch south park then I tip my hat to you on however you found out about her. hahah. She is some Japanese lady who sings songs that have already ben written.
Here is her official web site. You should be able to listen to some of her sweet tunes here too.
Wing Music - The official Wing website - Download Wing Mp3s here.