Haha! Well.... Find the song on your computer (right click the song in iTunes and hit "Get Info"; it should be near the bottom on the Summary page). Once you know where it is, go to a site like sendspace.com or yousendit.com and upload that file onto the site and voila! a link.

...But if it's too complicated, seriously, don't worry about it. I'm sure someone else will have it! <3333333

(And omg you're doing BigBang! GO YOU!)