That's because no-makeup Jessica is one of the most horrific things human eyes have ever witnessed. I've seen them without makeup heaps of times though, and I probably see less SNSD stuff than 90% of the guys in this thread.Its also cool her company lets her do this. I bet you'd never see SM letting Soshi do something like this, they would probably be afraid it would ruin their image. Hell, they won't even let those girls be filmed without makeup. That's pretty sad.
Anyway it seems Hwayoung's "moonwalk" only lasted one performance before they cut it ahah. I still much preferred the M Countdown performance.