Even the Queen of Christmas loves her Christmas music. Mariah Carey just posted a video to instagram featuring and her son, Moroccan, singing along to her hit song: "All I Want For Christmas." In the video, Carey explained that she and Moroccan were making her "favorite sauce" for the holidays. Carey also took to instagra to explain that she had several gifts coming for her fans. One gift was new music videos of Carey singing her pop Christmas hits.