A man named Nostradamus Lou Barlow once sang: "Started smoking pot / Thought things sounded better slow / much slower." Witch house provocateurs SALEM heeded his advice -- and "Justin Bieber 800% Slower," etc. -- in their dragged-out remix of Britney Spears' "Till The World Ends." They also made a video to go along with it: The clip features underage-seeming ...