Mariah Carey Struggles in 'All I Want For Christmas' Performance

Mariah Carey her signature holiday favourite "All I Want for Christmas Is You" at Rockefeller Center in New York  at the 82nd Annual Rockefeller Center Christmas Tree Lighting Ceremony. The 44-year-old sounded rather off-key and missed a few key high notes, making it a rare misstep for the immensely talented vocalist.