It gets better. The boyband 2am (one of my favourites!) decided to sing their own version of the entire song! Not sure whether to be impressed or disturbed but I think it's absolutely hilarious .
Practice:
Concert:
You never know what you'll get at a Korean concert!
Not like it really matters. Both are pretty much rip offs of Aretha Franklin (Chain of Fools), which is probably a rip off of something else I've never heard of.
Reminds me of the controversy regarding Girl's Generation's Run Devil Run song, which originally sung by Ke$ha. But she sold the rights to the song to Girl's Generation instead or something. Anyway here's a random mash-up of it on Youtube!