I recently submitted a tune for SLS13 consideration. I submitted "B.Y.O.B" from System of a Down.
"Cigaro" was leaked via the Internet earlier in the year and I linked to it and enjoyed the hell out of it, but it wasn't System of a Down's first single off their new album. "B.Y.O.B" is and it's typically manic, fun and thought provoking.
System of a Down is consistently awesome.