Mariah Carey has had a LOT of hits. She reportedly wrote 7 of her first 8 #1's. "All I Want For Christmas Is You" has been a huge success for her. Not only has her rendition been a huge holiday hit. Others have recorded it as well. The list includes Idina Menzel, Kelly Clarkson, Michael Buble', & Karmin. The best known "cover" version that of Vince Vance & the Valiants. Mariah, as co author, gets a "piece of the action." So, how much does she earn from that one song? The Independent reports, Mariah's earnings from "All I Want For Christmas Is You'' are approximately $500,000.00 per year.