Mel B shocked millions when she appeared on hit ITV show The Masked Singer.
The Leeds singing sensation performed on Saturday night's show inside a seahorse costume.
Her identity was revealed after judges voted for her to leave the competition.
And the former Spice Girls' appearance on the show shocked fans as she had kept them guessing right until the end.
One posted on Twitter: "Shook it was Mel B."
Another said: "I'm shocked the seahorse was Mel B. Didn't think that at all."
Another fan posted: "So shocked Mel B did this...and we didn't see her!"
While one said: "NOOOOO!! I am in absolute shock. Mel B did not save pop music along with Spice Girls in the 90s to be unmasked second on the Masked Singer."
Judge Davina McCall said she guessed it was Mel B behind the mask by her distinctive Yorkshire accent. Fellow judges Rita Ora and Mo Gilligan also guessed correctly.
Mel said: "I thought I disguised myself pretty well with my voice and accent, and trying not to be like me, I guess I didn't, did I?"
Host Joel Dommett asked Mel why she had decided to take part.
"The show is great," she said. "You just get to not be yourself for a sec really."
Asked what her fellow Spice Girls would think about her appearance, Mel said: "They will probably be annoyed that I didn't tell them!"
