Bailey Lindsay, 21, was one of six contenders hoping to convice the judges of his singing talents on the new BBC One talent show hosted by Paddy McGuinness.
The aim of the mystery music game show is for two contestants to pick a good singer out of six 'mystery singers' to duet with the guest artist on the 'stage of truth'.
Bailey, who lost his leg to cancer, starred as The Knockout – but his terrible yet energetic performance of Swedish House Mafia and John Martin's hit 'Don't You Worry Child' wasn’t enough to earn him the £10,000 prize up for grabs.
Contestants have to weed out the good from the bad in a bid to land the jackpot. If they do, they walk away with the money, but if they don’t the bad singer gets the prize.
Last night’s show saw Bailey attempting to impress judges Alison Hammond, Amanda Holden, Jimmy Carr and guest singer Ronan Keating.
But he was beaten to the top spot by fellow South Yorkshire contestant, Devon Chapman, a medicine student from The University of Sheffield.
Bailey started amateur boxing training at the age of 15 and he used to train with Josh Warrington, the featherweight champion from Leeds and has also worked with world heavyweight champ Tyson Fury.
Last Christmas, Fury visited Lindholme Community gym in Doncaster where he sparred with Bailey, who lost his leg two years ago.
At just 18 years old Bailey was diagnosed with osteosarcoma, a rare form of bone cancer.
Bailey said: "First thing he said to me when he came in was 'right, I'm having you with the one leg. Me and you are sparring today.
"Just to break that ice it was good. So we got into the ring, did a bit of body sparring and to be fair I gave him a few hard shots at first and he stopped and looked at me in the ring and said 'look at you, you've got a hard punch for someone with one leg.'
"Then I thought I best take it steady before he goes and knocks me out."
Watch the episode HERE