1) "All I Want For Christmas Is You" - Mariah Carey
2) "Have Yourself A Merry Little Christmas" - Frank Sinatra
3) "Adeste Fideles" - any version, really, but I like Celine Dion's and Josh Groban's versions
4) "Angels We Have Heard On High" - also any version. I also like playing it on the piano :3
5) "Christmas Eve/Sarajevo" - Trans-Siberian Orchestra

Only 5? There so many I actually like :X