Video: Mariah Carey and Matthew Morrison at Christmas in Washington

TV special Christmas in Washington has finally aired for public viewing pleasure over the weekend. Hosted by Ellen DeGeneres and attended by U.S. President Barack Obama and his family, it featured live performances from Mariah Carey and Matthew Morrison. The mom-to-be singer belted out "One Child" and "O Come All Ye Faithful", and the "Glee" actor opened with a couple of verses from "I'll Be