Mariah Carey & Daughter Monroe Sing Together at Her ‘Merry Christmas To All’ Tour

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Like mother, like daughter! Mariah Carey kicked off her "Merry Christmas To All!" Tour over the weekend in Toronto - and she had a very special guest that helped her sing a holiday classic. The songstress' 11-year-old daughter Monroe joined her famous mama on stage to harmonize "Away in a Manger" together.