In 2019, Mariah shared her must-have holiday gift list with Amazon. Among the items featured was an exclusive Mariah Carey collection of matching kids and adults holiday onesies. “You have to be festive even when you're sleeping!” she explained. “This onesie will put you in the Christmas spirit while keeping you cozy in the cold winter nights. This comes in all sizes so you and your family can match up all through the holidays!”.