I love Spiderweb Suit song. Helena Josefsson, one of the members of the band, also is one of my favorite singers. 

http://www.youtube.com/watch?v=E6iIHmNnu9k

This is one of those songs which make me feel cheerful almost every single day. 

http://www.youtube.com/watch?v=uWhH6GhbZnE

One of my favorite songs that I listen again and again without even being bored for a second, is called Crazy, by Gnarls Barkley. The background soul choir and the violins that they used in this piece of art impresses me a lot, the voice of the singer is so smooth and grave that I feel myself totally relaxed while listening to Crazy. You'll enjoy it.

http://youtu.be/VzV9QExGFQs