noiseball – i listened in

i listened in

my first attempt at a full-on Girl Talk style mashup:
[audio:http://www.davidding.com/audio/other/i_listened_in.mp3|titles=i listened in|artists=noiseball]
contains elements from 39 different songs.
prize for first person to name all 39 of them!
you can post answers here
[each song by a different artist!]