OK, let's start this guys!
I think the best year for every musical acts (Western, Asian, K-Pop, Jpop, etc) is 2008.
Yeah, it's like every good song was released on that year like:
- Lady GaGa's The Fame (incl. Poker Face, Just Dance, & so on)
- MC's E=MC2 => her best album to date IMO
- ayu's Mirrorcle World
- Kuu's TABOO
- Hikki's HEART STATION
and many more...
so, what year do you guys think is the best year for every musical act?