I was searching for MAMA 2012 performances today when I came across the EXO/Shinee joint performance "Time Loop." Unfortunately, the quality wasn't as good, but there is also an HD video of their rehearsal! They were great, I think:

http://www.youtube.com/watch?v=AbmJqqKoqOI

These dances made me reminisce of the past, but what can we do? The past is gone, the future is ahead. Let's continue on with EXO and Shinee to the future! 

But really, the performances were great. I usually don't fangirl out loud, but I lost it a bit when I watched this ^^