I have a few of them.
I really like Ordinary Day, by Great Big Sea. It makes me feel happy and thankful
http://www.last.fm/music/Great+Big+Sea/_/Ordinary+Day
Wish You Were Here by Pink Floyd makes me feel calm.
Love love love Three Little Birds by Bob Marley
For times I feel spiritual the old hymn Be Not Afraid makes me feel calm also, but sad.
Can't think of any other ones right now, but I'll have to check out Miley. My kids haven't gotten into her yet and I've been staying away because she's so darn commercialized. Does she actually have talent?