Mariah Carey is one of the highest-paid singers in the music industry and has earned over $400 million over the course of her career. Her iconic Christmas song, "All I Want for Christmas Is You," has been a hit every holiday season and has brought in millions of dollars in royalties for her. Additionally, her annual Christmas concerts, merchandise, and other holiday-related activities generate a significant amount of income. However, it is difficult to determine the exact amount that she makes every Christmas as it varies depending on factors such as the number of concerts she performs and the amount of merchandise she sells.