recently: “There’s fame and there’s ultra-fame and it can destroy. You lose your perspective, you’re in the eye of a hurricane and you don’t know you’re there.
Maurice, Barry and Robin Gibb with their manager Robert Stigwood Credit: Shutterstock Following their reformation in the 70s, the singers became disco hits Credit: Kobal Collection - Shutterstock The band became hooked on drugs in the 70s, according to Barry Credit: Alamy "And you don’t know what tomorrow is, you don’t know if what you’re recording will be a hit or not. And we were kids, don’t forget.”
Looking back at their initial split, it is clear the brothers weren’t able to handle being permanently in the spotlight.
“If you've never been famous it is really hard to handle. We were all very selfish. The testosterone kicked in. All of us wanted to be individual performers . . . and therein lies the issue," he says in the documentary.
"We stopped looking inwards to each other and started looking outwards to what we could do individually. 'To hell with my brothers' is what we all thought."
Barry was voted Best Dressed Pop Star of the year in 1969 Credit: Times Newspapers Ltd 'I preferred him as Maurice, not being a Bee Gee' After regrouping they went on to have a string of hits with disco classics You Should Be Dancing, Saturday Night Fever and Jive Talking.
But their resurgence was short lived as a backlash against that kind of music led to the FBI and secret service having to be present every time their jet landed due to bomb threats.
Robin Gibb and wife Dwina Waterfield, pictured before their wedding in 1983 Credit: Rex Features Recounting the threats in the documentary, Robin’s wife says: "They suddenly realised they were in a different position. Robin went through a kind of, it wasn't a breakdown, it was just something where he felt very shy of being in public and doing things for a while."
Barry adds: "It wasn't just the Bee Gees, it was the idea of dance in that period. It was no longer acceptable for this kind of music to carry the weight, to carry the industry.
"Everybody was at that point in their lives where they began to look for other things to do... Andy was having problems."
Maurice, Barry and Robin Gibb with parents Hugh and Barbara and younger brother Andy Credit: Harry Goodwin It is clear from the testimonies from family and friends that the brothers never managed to stay happy when they were performing.
Maurice’s wife Yvonne adds: "They were crazy days. I preferred Maurice not being a Bee Gee if that makes sense."
'I'd rather have them back here and no hits at all' And it’s clear she’s not the only one who now thinks like that as Barry would trade everything to have his brothers back.
When Maurice died in 2003 from a heart attack, he and Barry had drifted apart once again.
The brothers had a difficult relationship in more recent years Credit: PA:Press Association Maurice was married to singer Lulu from 1969 to 1975 Credit: Times Newspapers Ltd Robin Gibb passed away in 2012 following a battle with cancer Credit: Wenn The same happened in 2012 when Robin passed away from cancer .
He says: “When I think about it now. I think about how it all sort of started. We just had this dream and we thought ‘what do we want to be famous for'.
"It turns out it was the songwriting. I think everything we set out to do we did against all odds. I can’t honestly come to terms with the fact they’re not here any more.
"I’ve never been able to do that. I’m always reliving it. It’s always, what would Robin think or what would Morris think? And Andy.
Barry says he can't come to terms with the fact his brothers aren't alive Credit: NBC Universal "It never goes away. What I wanted to say earlier is I'd rather have them back here and no hits at all."
'Brothers in general it's a very complicated thing' Nick Jonas, one third of the Jonas brothers knows first hand just how hard it is to work with those closest to you.
He says: “Brothers in general it's a very complicated thing. Emotions are heightened and there's things that go back to childhood about, you know, if one kid got more attention than the others.
The Jonas Brothers recently reunited Credit: Getty Images - Getty Noel and Liam Galllagher have had a tough relationship over the years Credit: Getty - Contributor "All these things play out in front of a small group of friends but when you magnify that with the whole world it changes the game a little bit."
He adds: “There is something about entering the world from the same place, it has an affect on your ability to sing together, your creative awareness and your artistic voice."
And another musician who knows just how damaging huge fame can be is Noel Gallagher.
He and brother Liam, who made up Oasis, are still famously feuding and it seems unlikely they’ll ever reconcile like the Bee Gees.
Noel says: “I always say making music with your family is equally the greatest strength and greatest weakness you could ever have in a musical partnership.
"To get to the top or near the top you have to be extremely driven and what drives you is your ego. When you get there everybody has got an ego about it, it can be tricky to stay there.”
As it stands, it looks like Liam and Noel are heading towards the same fate as the Gibbs brothers – especially as there is no reconciliation in sight.
Bee Gees star Barry Gibb's son details drug battle that left him homeless