Mariah Carey household means that everyone, including the pets, needs to know about the singer’s 1994 smash-hit holiday song “All I Want for Christmas Is You.” Carey recently took social media to share a video of her belting the classic alongside her dogs and twins Monroe, Moroccan Cannon.In the video posted on Mariah’s Instagram account, the songstress starts by singing the part “All I want for Christmas is…” to later be joined by Monroe, Moroccan, and their two puppies singing —and barking —