Tim Elliott asks Dr. David Tully, Head of Media at Middlesex University Dubai, the million-dollar question: "How Much Does Mariah Carey Earn Every Christmas?" They discuss the astronomical revenue generated by 'All I Want for Christmas Is You' and unpack the business model behind the entire festive media season. The discussion explores the psychology of nostalgia, why Christmas content is the ultimate 'evergreen' goldmine, and how Charles Dickens' A Christmas Carol first created this lucrative, reliable revenue stream for creative industries.