It was also revealed that the soul singer, who announced the arrival of her first child earlier this month on Facebook, was heavily pregnant under that sausage and chips costume at the time of filming.
So naturally, it must have been tough to perform inside the huge outfit, which several other singers have admitted they find the toughest part of the show.
"I didn't realise how breathless I was going to be," she told Eamonn Holmes and Ruth Langsford on This Morning today. "I didn't know that was a side effect of pregnancy.
"I guess all of your insides get pushed around, don't they? You lungs are half of what they normally are, and I picked these massive songs that needed a lot of breath and then you put on that suit.
"Oh my gosh, just walking out I was [wheezing], 'I can't breathe, I can't breathe', which made it funnier."
Eamonn then asked her if there was a time when she regretted joining the show, to which she said: "Yes! When I was trying to catch my breath!
"But really it was just all good, and the people who worked on the show are lovely.
"It was just such good energy, and I feel like the way it's come across to everybody watching, it has given good energy, which is what we all need."
Saturday's final was the most-watched non-news or sports broadcast of the year so far, with huge numbers of viewers tuning in to find out the identities of Sausage, Badger and Robin.
The Masked Singer airs on ITV.
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