Nick Cannon and Mariah Carey's twins, Roc and Roe, decorate their Christmas tree with their "pip" version of "The Twelve Days of Christmas." Nick Cannon and Mariah Carey's twins, Roc and Roe, decorate their Christmas tree with their "pip" version of "The Twelve Days of Christmas."From an angel with sparkly, shiny wings to four skiing snowmen to twelve chugging choo-choos, Roc and Roe have a frolicking time getting ready for the holidays.