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I rather the term, less young.. actually not really. lol Happy birthday, I love the pic you used, I can just hear their tiny-annoying voices in my head D: lol ;D
As far as sending you a birthday song goes, even considering all of its unimportance and irrelevance in this situation, I'd go with Happy Birthday.. <3
Happy birthday, Demian09 my friend.
...Happy birthday to you, my friend!...
Feliz cumpleañoos tio !!
http://www.youtube.com/watch?v=M3UGG4Xz4i4 <--- xDDDDD
Happy birthday Demian