Mariah Carey is getting her twins into the holiday spirit!The iconic singer kicked off the first night of Hanukkah on Sunday by sharing a sweet video featuring her 10-year-old twins, Moroccan and Monroe. The brief video shows the GRAMMY-winning singer attempting to teach her kids a new song to mark the Jewish celebration, though they both look less than enthused at the impromptu singing lesson.«Happy Hanukkah!!!!» she wrote on Twitter.