Like,"www.myspace.com/deathcabforcutie", for example.
Now on their page, you'll notice on the right there's a big greyish sort of looking box, and they'll have about up to four songs, it depends on how many they've uploaded on their. Now, if you want to make one of the songs on there you're song, right underneath the song you want, there'll be a couple little links "Download, rate, comments, lyrics, add". Now just go click "add", and it'll ask you if you want to make this your profile song? Then you just click yes, and there you go!
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