“O Come, All Ye Faithful” dates back to having a publishing date of 1760. Originally written in Latin as ‘Adeste Fideles’ by John Francis Wade. It was thought to have served as a rally cry for the Stuart cause.
The English translation was created by Frederick Oakley and William Brooke in 1841. The hymn originally had four verses and was eventually extended to eight.
There have been other assumptions and claims regarding who really snags the writing credit. A skim through the Wikipedia page will enlighten you more.
In 2006, Twisted Sister released “A Twisted Christmas,” a collection of Christmas tunes performed in the Twisted Sister style. When it came to promotional radio play, their version of “O Come All Ye Faithful” was the single played to ring in the holiday season by Dee Snider and Co. If you notice, the song’s melody is identical to their former hit, “We’re Not Gonna Take It.” Nothing says “Welcome, baby Jesus!” than some saucy dance moves with a plastic candy cane.