oh that's very easy
At the top of my head now
- BREAKERZ's Winter Bell , last year's WINTER PARTY
- KAT-TUN's White X'mas (album & single versions , not much difference though LOL)
- KinKi Kids's Harmony of December
- DOUBLE & Shota Shimizu's Oyasumi no Kiss wo ~Goodnight My Love~
- ARASHI's Still ... , Snowflake