The presenter, 56, screamed and jumped up from the panel as the character was unveiled.
Appearing to hold back tears, she said: “This is the best surprise, better than any birthday. I love this man.
“We’ve been working together for thirteen years and I can not believe I didn’t recognise your voice, I didn’t recognise your singing voice. I know your singing voice. This is insane.”
Maypole was also unmasked on Saturday, revealed to be Pussycat Doll Melody Thornton.