Paul Akister reportedly spent £9,000 on a makeover for The X Factor 2014.
The talented singer made judges' houses last year but is back this series sporting a much more different look.
Slimmer Paul revealed how a strict diet helped him shed the weight ahead of his second attempt.
“I’ve just had no carbs and no sugar, as well as a personal trainer and I've been running up and down 100 steps with a backpack on," he said. "X Factor gave me a focus to do it. Before that, I didn't really have a reason to diet.
"Diet was a massive part of it. It's called the Ketogenic diet. You can only have 30 grams of carbs a day, and that's mainly in vegetables. I can't have beer, and I like beer. But I can still have vodka and diet coke!"
Paul was controversially cut from the show at judges' houses with Louis Walsh last year, and it's a decision that he understands.
“My confidence wasn't there," Paul recalled. "That's the main thing. I'm not shy now. I was shy before, I didn't talk to anyone. I'd sit in a corner not talking to anyone.”
And the 26-year-old told how he's now single after splitting up with his girlfriend just before the auditions began.
He said: "My girlfriend actually split up with me just before the room auditions this year. She split up with me because I kept going out!
"She probably just had enough of me. But splitting up with me was a bit harsh!"
The X Factor airs this Friday, Saturday and Sunday on ITV.
Browse pictures of Boys singing at The X Factor 2014 judges' houses below...