Hello world...
7 stands for infinity
but there is nr 8
here's song nr 7 of my personal playlist (with the list included)
http://www.youtube.com/watch?v=WEi9ZQrEjr8&list=PLE75F76BBFE99A180&index=7&feature=plpp_video
guess which one from all of the rest stands for:
8th song

hint:
SHA-256 hash for the title of song nr 1 is:
5bf652191e5f46ee33a937534b472be14252e3610a3007cc87a86d283d6130f2