Unless you love listening to Christmas music 24/7, you'll be listening to a majority of it at work (especially retail) or out shopping.
Personally I don't mind Christmas music, but when my work has the same 50 songs on rotation, with multiple versions of certain songs no less, I just want to crawl under a table and rock myself until it's over. Ok, that's exaggerating it a bit, but I have learned to tune them out.
In an ideal work experience, here are some of the songs I would gladly hear on a continuous loop during Christmas.
Bing Crosby & David Bowie - "Little Drummer Boy/Peace on Earth"
Jimmy Eat World - "Last Christmas" (Wham cover)
Judy Garland - "Have Yourself A Merry Little Christmas"
Ron Sexsmith - "Maybe This Christmas"
Mariah Carey - "All I Want for Christmas is You"
Zooey Deschanel & Leon Redbone - "Baby It's Cold Outside"