So, why the split after the mega-selling ‘Together’ and the follow up gold album ‘Perhaps Love’?

Perhaps even more of a shock was the fact that Charlotte made Simon Cowell eat his words.

Having originally suggested that Jonathan ditch Charlotte to throw more light on his classically trained voice, he’d totally changed his mind by the duo’s second performance.

The loyal lad refused and won the hearts of the nation (and eventually even Simon) in doing so.

Having worked closely with the music and TV titan, Jonathan also reveals that Simon Cowell's Mr. He told me that Simon is actually an absolute "sweetheart" in real life. And we're not finished yet - there's still plenty more to come from Jonathan.

An overweight, badly dressed contestant lumbers awkwardly on to the Britain's Got Talent stage, prompting the judges to roll their eyes at the inevitable car-crash of a performance to follow . Alesha Dixon: "Charlotte, there was a lot of pressure on you tonight, and let me tell you, you held your own, you started that song so beautifully.

And this is a special friendship, and there is special chemistry between you, and when you sang, Jonathan, I felt that in every part of my body."Amanda Holden continued: "It was just a tour de force.

Speaking on Thursday's episode of Lorraine, the opera star was joined by fellow BGT success stories Jamie Raven and Francine Lewis as they detailed their career highs.

Reflecting on his time on the show - which he competed in when he was just 18 - Jonathan explained: 'It's been five years, it completely blows my mind that it's been so long. 'I’ve been able to forge a career, as soon as the show ended me and Charlotte were in the studio, I'm exited for the future.'Despite starting his journey with best friend Charlotte, the singer admitted that they were no longer as close.

The singers competed in the 2012 series of Simon Cowell's ITV talent contest, finishing as runners-up to Ashleigh and Pudsey.

In a statement, they said: "We have had the most exciting journey together ever since meeting at West Hatch High School in 2006 and are so happy for each other.

Subsequent stories of his struggles with depression and even suicide painted a gloomy picture.