The Oscars red carpet may be mostly glitz and glam, but when it comes time to kick back and celebrate those big wins? The stars tend to heat things up, changing into decidedly sexier ensembles. At this year's afterparties, we saw tons of sheer, cutout, and thigh-slit looks, most of which will make you sit up and say "Whoa!" Scroll through to see 'em all, then check out who dared to bare at the awards show itself.