JA
That comment being as one of the Masked Singers left the stage. He was joking that it might be her under the mask, like how the panellists on the show often guess wrong. And since Masked Singer was recorded before she got in trouble with the law, it is technically possible for her to have been on the show.
Then of course the awkwardness of Phil and Ruth, and just to top the night off Walliams with his rather odd comment about Caroline Flack!