Some songs to entertain you (or not) while you pass the time! links available at time of writing, I assume no copyright issues :P!

http://www.youtube.com/watch?v=38v0Kj86MhA
http://www.youtube.com/watch?v=x4ceUYL9g7I&feature=related
http://www.youtube.com/watch?v=U0tLTm0kaHQ&feature=related
http://www.youtube.com/watch?v=8cPitxtk4m0&feature=related

and some not by them:
http://www.youtube.com/watch?v=xpdGR7JYiLc
http://www.youtube.com/watch?v=8kNwvIEQsg0
http://www.youtube.com/watch?v=aPtE0EdgdLs

http://www.youtube.com/watch?v=Qjde8CVlLmw

http://www.youtube.com/watch?v=e9K1DKzDs08