Big Bang did GaraGaraGo, Let Me Hear Your Voice (Koe Wo Kikasete) and Fantastic Baby on Music Lovers.
GaraGaraGo
More video below the cut:
Let Me Hear Your Voice
Fantastic Baby
Great performance and I think the audience reaction made it even better.
Interview (upload and subs by bbvipchannel)
Thanks to bestkpopvideos for the uploads and to bbvipchannel for the subs!
Always Tae Yang 
lol dae yb n top messed up at the end.
Both videos have been taken down already? T.T
Just in case if others are having trouble as well, I found alternative links. Unfortunately, there is no English sub.
It is so great to revisit the some of the earlier songs again. It reminded me how I fell in love with them!!
Thanks a lot! The japan shows usually get taken down really quickly so this is a help.