Did Amber really cut her hair off?

I mean, look:

This is at Sogang University Event (130511).

This is at Show Champion (130508)

And over is a event in 130517. Obviously her hair is much shorter in this one than in the first two pictures. And her hair looks unnatural in the last one. I mean, is she wearing a wig or something? On a personal note, her hair in first two pics is like from La Cha Ta era, right? What do you guys think? Pictures are from Affxtion.