Christmas only? I *think* all of these should count:
Tommy heavenly6- I<3XMAS
Kanjani8- 10nengo no kyou no hi mo
the brilliant green- angel song ~eve no kane~
V6- Lonely Holy Night
V6- Silver Bells
KAT-TUN- White X'mas (I forgot that I loved this song!)
TOKIO- ding-dong
BoA- Merikuri
B'z- Itsuka no Merry Christmas
Tatsuro Yamashita- Christmas Eve
Namie Amuro- White Light
GReeeeN- Fuyu no aru hi no uta