Mariah Getting Set for a Holiday Tour Halloween is right around the corner, but Mariah Carey has her eyes set on the Christmas holidays. The songstress has announced that she will perform several Christmas-themed concerts to brighten your season. Mariah's "Merry Christmas To All Tour" will take place in Toronto and New York on December 11 and 13. Tickets are available starting this Friday. Have you made your holiday plans yet? What is your favorite holiday tradition?