2012 TV Couples March Madness Challenge: Elite Eight!

What do a married couple, an on-again-off-again Upper East Side pair, a set of cheerleaders, two lovable nerds, a pair of glee club frenemies, an angsty vampire-human duo, supernatural partners, and a set of friends-turned-lovers have in common? They've all made it to the Elite Eight of our TV Couples March Madness Challenge!