pbr Robbie Williams has confirmed rumours that he and Gary Barlow have been working together.br ppbr The former Take That bandmates have co-written and dueted on a new single called Shame.br ppbr It will be released on October 4th and will be on Robbie's upcoming greatest hits album - In And Out Of Consciousness - which will be out a week later.br ppbr The singer and Gary fell out after Robbie quit Take That in 1995, but the past few years have seen the pair rekindle their friendship.br ppbr In a statement about his new album, 36-year-old Robbie said: "It's incredible to listen to the album and realise that it's already been 20 years of making music and playing gigs.br ppbr "And the great thing about the album is that it's not only a celebration of my past but also a bridge to the future.br ppbr "The fact that part of the future includes a name from my past makes it all the more poignant for me.