Love threads like this. The first ones that come to mind are these:
Far away (MUSIC STATION) - I just remember really enjoying the way she sang it when I first watched it.
Voyage at that Best Artist event because she forgets her lyrics and is very cute about it.
HANABI ~episode II~ at HEY! HEY! HEY! just because we never get performances of this song.
HANABI ~episode II~ at ayuready? #46, because it's an acoustic version and it sounds amazing. A studio version should have been on a single or ayu-mi-x release.
STEP you at MUSIC FIGHTER. I remember loving all the STEP you promotion that was going on at the time!
fairyland at HEY! HEY! HEY! - same reason as above!
Sunrise ~LOVE is ALL~ at MUSIC JAPAN because it's so energetic and cute!
BLUE BIRD + evolution at FNS because I remember being IN Japan at the time and was just getting back to my hotel. Turned the TV on and there she was! I turned it on just in time. So awesome!
The SONGS performances from earlier this year. I miss seeing her on TV. She sounded really amazing during this.