Edison Research has released a national survey they did of the most loved and hated Christmas songs. Topping the most loved list was Nat King Cole's "The Christmas Song", with Bing Crosby's classic "White Christmas" second. The most hated was the instrumental version of "Jingle Bells" by the Singing Dogs (They just bark the tune. Literally.)
Also making the most hated list was "Grandma Got Run Over A Reindeer" and Eric Cartman's ("South Park") rendition of "O Holy Night".
Memo to Eric Cartman: Though it's fairly common, cartoon characters should not sing. Ask anyone who had to sit through "Do The Bartman."