[Chris85]

Lip synced this time:
1) kanariya
2) Fly high (choruses only)
3) UNITE! (choruses only)
4) M
5) appears
6) Because of You (the only live part is "yeaaaaaah" she sings right after the song ends)

It becomes more apparent If you listen attentively: you'll hear that despite having throat problems on 31/12, her voice suddenly sounds surprisingly crystal clear and not sick at all.
Do some of you guys still think she's singing too much and needs rest? :-P
I think it's interesting that Ayu herself knows what kind of vocals are expected from her, so she uses pre-recorded vocals with many flaws so that they would sound realistic.
For the 31/12 they lowered the key for poker face comparing to 29/12.