"Who is the most Overrated artist?" or when threadstarters just cut to the chase, "Is Beyonce overrated?"
"Who is the best vocalist" / "best dancer" only because they feature the same names every time. Just do a thread search sistrens
"Britney looking 0", but not so much any more.
"Are you gay/what is your orientation/position" etc, which invariably gets closed in about a page or two.