Talking on old live perfomances, I love Yume no uta from a-nation' 07 (I guess), which was performed just a bit before she released Ai no uta. Yume no uta is so powerful and suits her strong vocals so well, while Ai no uta is much more... erm, karaoke-friendly?
Almost all lives she held a bit before and some time after FEVER LIVE IN HALL are amazing for me, that was her most strong period for live vocals imo. Not a coincidence MORE is from that time. Oh God, that song is such another gem
