In need of a strong dose of holiday spirit? Our favorite-ever trio from Doctor Who is here to spread some seasonal cheer! Sing along as Matt Smith, Karen Gillan, and Arthur Darvill lead a rendition of "Have Yourself a Merry Little Christmas." The clip aired in a previous episode of Doctor Who Confidential, but with all the stars having moved on to other acting endeavors, we'll gladly take an out-of-character cast Christmas carol.