who sings rudolph the red nosed reindeer

That is actually a difficult question, because there are many versions of that song that have been recorded over the years. The most famous version of "Rudolph the Red-Nosed Reindeer" is by Gene Autry, but other artists have also recorded the song including Burl Ives, Harry Connick Jr., and The Jackson 5. So, there is no one definitive answer to that question.