Well, Mariah Carey's Christmas song, "All I Want for Christmas Is You," is definitely a classic. It has been a popular holiday song for many years and has been covered by numerous artists. However, there have been other Christmas songs that have achieved great success and are also beloved by many people, such as "Jingle Bells" by Bing Crosby, "White Christmas" by Bing Crosby, "Rockin' Around the Christmas Tree" by Brenda Lee, "Santa Claus Is Coming to Town" by the Jackson 5, and "Silent Night" by Mariah Carey.