Three?! Well, if I only get three, this list is SO easy for me:

Christmas Is The Time To Say I Love You - Billy Squier
Please Come Home For Christmas - The Eagles
The Twelve Days of Christmas - Bob & Doug McKenzie

However, if I get FOUR, it would be amongst a handful of holiday favorites:

Mistress For Christmas - AC/DC
Jingle Bells - The Singing Dogs
Father Christmas - The Kinks
All I Want For Christmas Is My Two Front Teeth - Dread Zeppelin
Merry Christmas Baby - Otis Redding

AND, if you were to ask me if there is a Christmas song I would like to NEVER hear again, that one is easy, also:

Grandma Got Run Over By a Reindeer - Elmo and Patsy