Mariah Carey 's fans were left disappointed when they realised the queen of Christmas wasn't performing live during the NFL Christmas game. Netflix was streaming the Kansas City Chiefs vs Pittsburgh Steelers and Baltimore Ravens vs Houston Texans games, along with the performances. The diva had been announced to perform her record-breaking holiday hit All I Want for Christmas is You before the games. However, as the festive moment arrived, it wasn't live as many had anticipated. Mariah was seen