"I just want back in your head" - Tegan and Sara

Tegan & Sara:
http://www.youtube.com/watch?v=9e9NSMY8QiQ

Just don't read the comments.

This instrumental song will send you shivers down to the soul, in a good way, in 1:56 minutes:

http://www.youtube.com/watch?v=OcZhyH-ODd4