Why now?!

To be honest... I don't think I was the only one to be surprised about this..
SNSD releases a Japanese of their hit song Oh!
But why now?? They have released other songs before this one and it feels quite long time ago, therefore... why now?!
Also when listening to this version, I'm sorry but it's MESSED up!!
My brain hurts when I listen to it, it's in English, Japanese and Korean! It's not the languge mix I dislike in itself, it's more HOW they decided to mix it.
Also it sounds TOTALLY weird in all. Kinda sad as Oh! was such a catchy song.
What I like with this video is the outfits, I like them much better than the Korean version, but I guess that's it!