SNEAK PEEK: Mariah Carey’s 'Christmas in Washington'

Mariah Carey wasn't just in Washington D.C. last week to share her happy news about having twins with the First Family!

She was there to tape the special Christmas in Washington TNT's 12th annual special, airing Friday, December 17 at 8 p.m. Carey was joined by  Miranda Cosgrove, Glee's Matthew Morrison, Annie Lennox and half-Boricua heartthrob Maxwell for the special, which was hosted by Ellen DeGeneres. If you can't wait until Friday to catch her performance, check out a sneak peek of Mariah singing "One Child" below: