I listened to the Silent Night rendition that Ayu and Gackt did together for the first time this season last night. I find it to be so charming, they both struggle with some words but manage to look so cute while doing it. My boyfriend, while he adores both Ayu and Gackt, thinks the song is just laughable. Cute, but laughable. Haha.
For those who haven't seen this gem:
http://www.youtube.com/watch?v=GNYofHsCcAY
It's gotta be from at least 5 years ago, maybe more, not sure. I love it though.