Robobbuny's identity has been '100% confirmed' in the eyes of Masked Singer viewers and it's all down to the song they chose to open Saturday's show with.
Quite possibly the most bizarre character in the ITV show's history to date, Robobunny has been the subject of plenty of social media activity since they made their first appearance at the start of the month.
They sparked a wild theory that there were two people hiding in the costume, which would be a huge first.
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However, after their cover of Star is Born anthem Shallow a few weeks ago, there was one name on everyone's fingers as they swiftly typed their predictions on Twitter... Mark Feehily.
Many fans of both The Masked Singer and Westlife were left in no doubt that it was Mark behind the mask after his famous falsetto could be heard as the song built to a crescendo.
Robonunny used a similar technique to try throw the panel off the scent on Saturday as he performed BTS hit Dynamite, starting off with a very different voice, before the falsetto was heard once again.
As well as Robobunny sounding like Mark from Westlife, fans picked up on host Joel Dommett's warning that the song choices could be clues themselves.
And it just so happens that there is song called Dynamite on Westlife's hit 2019 comeback album Spectrum.
On realising that, one viewer took to Twitter to post: "Westlife has a song called #Dynamite. #Robobunny 100% Mark #MaskedSingerUK," with another, having also done some sleuthing of their own, reacting: "Lol #Robobunny 's singing DYNAMITE and it's one of his clues!!.. I mean Duhh!!!"
A third tweeted: "Westlife literally have a song called Dynamite. If Mark Feehily is not Robobunny then I’ll sell a kidney"
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