Wagner says "The X Factor" needs his "abs and smile".
The eccentric former contestant - who landed in sixth place on the ITV1 talent show in 2010, with Matt Cardle winning that year - has admitted he's feeling "really young" at 63, after undergoing two hair transplants and working on his physique, and he has called on Simon Cowell to bring novelty acts like himself back for his planned All-Stars version of the programme to make it a more "fun" and "interesting" viewing experience.
Speaking to The Sun newspaper's Bizarre TV column, Wagner said:
"I think "X Factor" could do with some more interesting acts, not serious people who sing like they are suffering or dying.
"People at home watch and go "That's boring." I make people smile wherever I go.
"I've had two hair transplants and work out every day. I now have the best abs I have ever had in my life, at 63.
"I'll bring the fun. When I'm on stage I love it. I'm 63 but I feel really young."
The Brazilian-born singer previously described his performance as a cross between the styles of Sir Mick Jagger, Luciano Pavarotti and Tony Bennett.
Wagner said: "Music is all I want to do. I wish I could be like Tony Bennett and be successful well into my 80s. I would like to be like Mick Jagger. He is as fantastic as Luciano Pavorotti. There are so many role models for me."
Meanwhile, Jedward recently claimed bosses are "desperate" to sign them up to the All-Stars series.
Identical twins John and Edward Grimes said the show's bosses "definitely want them" to appear on the celebrity version of the talent show, which will see the winner awarded a lucrative deal with record label Syco and the chance to bag a Christmas number one single.
Edward said: "Well I can tell everybody that they're trying desperately to get me and John. They've been emailing us."
Whilst John added: "They definitely want us".
Despite their offers, the 27-year-old singers aren't interested in signing up as they feel they have "progressed" over the years and are no longer keen to "do Britney Spears or Ghostbusters".
John continued: "I don't want to go back and rewind what we've already done, we've progressed, we've got our own songs. I don't want to go back and do Britney Spears or Ghostbusters."
Music mogul Simon is planning to revamp the hit talent show with a star-studded line-up and is said to have set aside £3 million to attract famous faces for the show.
He is reportedly keen to sign up his "Britain's Got Talent" co-star Amanda Holden.
Gemma Collins - who shot to fame on "The Only Way Is Essex" - is currently in high demand and also thought to be wanted for the show. Soap stars, former musicians and TV presenters are expected to be approached so they can transform and reboot their careers.