i've just finished watching the HD file..
for me, Love song live performance is better in Best Artist, not because Ayu forgot a little part of her lyric, but i donno she didn't sound the best in MSSL..at the beginning, she sounded rushed a bit..
BUT, for "M" she really did great job! i don't think she was off key and she hit the high note pretty smooth
not like the usual high pitch but she did okay! maybe they did lower the key a bit, but i donno, i can't really tell a difference..