Masked Singer UK fans think they have worked out who Rhino is on the ITV series, after initial theories stated it was The X Factor winner James Arthur.
Rhino performed Snow Patrol's Chasing Cars, and the voice sounded a lot like James' familiar vocals, and some of the clues appeared to match him too - according to viewers.
But now, fans think another well-known singer is behind the mask - amid James himself responding to the theories.
Clues included a sherif outfit, three arrows, a town called Cobalt and a list of crimes on a sign. There was also reference to "two bad jokes".
Rhino's riddle was: "I'm chief of this town and happy-go-lucky but one of you guys might think I'm quite muggy."
Perhaps the "one of you guys might think I'm quite muggy" comment could be about James, who claimed he had a fling with Masked Singer panellist Rita Ora in the past.
He regretted his 2017 comments about the fling a few years later.
But many viewers are now convinced it isn't James at all, and is instead Charlie Simpson from Busted, who also formed the band Fightstar.
The three arrows could represent Busted's album cover for their self-titled 2002 album, where three arrows are pointed at each member.
The sherif clues could be linked to the band's name, Busted, while the stars on the outfit could link to Fightstar - and one fan suggested the Cobalt clue could be in reference to the blue coloured bedroom, from the Year 3000 video.
Clues aside, Rhino's vocals alone were enough to go on as viewers immediately recognised them as Charlie's voice.
A final clue could the the number given for the population of the town in the clue video, which was said to be 158697 - with a fan pointing out this was Charlie's birth date muddled up.
Taking to Twitter, viewers shared their theories with many going against the initial predictions.
One viewer said: "I actually cannot believe that the judges on #maskedsingeruk don't know that Rhino is obviously @CharlieSimpson!!!?"
A second fan said: "I would know that voice anywhere and i was pretty proud of myself for getting it after the first line. rhino is charlie simpson."
Another viewer wrote: "I’m 100000000% convinced that Rhino is Charlie Simpson. Recognised his voice immediately."
The comments kept on coming too, with another reading: "Rhino is Charlie Simpson 100%," as a fifth said: "Rhino is definitely @CharlieSimpson..can tell his amazing voice a mile off!"
It comes as singer James ruled himself out as being Rhino, and suggested another singer for the big reveal.
James took to Twitter and said: "For all those theorising, I am not the Rhino on #MaskedSingerUK it's probably Lewis Capaldi."
But fans still think it's him. One said: "That's something Rhino would say."
Another commented: "Rhino has got to be James Arthur? Sounds just like him!"
The Masked Singer UK airs Saturdays at 7PM on ITV1 and ITVX.
