He became a megastar with Take That, sells out arenas and racked up record sales of 77 million.
But Robbie Williams says his life's greatest achievement is staying faithful to wife Ayda Field.
The bed-hopper, who dated some of the world's most beautiful women, reckons she's changed his life.
He gushed: "What do I think is my greatest achievement? Monogamy. Yes, it wasn't on the cards."
Robbie, 45 and in the charts with a Christmas LP, has admitted he slept with fans and lapdancers.
But it seems he's now on the straight and narrow.
And kids Teddy, Charlie and Coco haven't derailed the couple, who wed in 2010.
Robbie said: "I thought these strangers were going to come and ruin the party. And the opposite happened. The universe leaves you these blanks you don't know you need to fill.
"And you do not know they are blanks until you experience everything.
"When the children come these blanks are filled. And you go, 'Oh wow. I am on a different level. I have achieved level family'."
"If you are surrounded by love then you will be love. And if you feel loved then you are whole.
"That is what I have learned from therapy."
But Robbie admits he still battles his demons on a daily basis.
He told Australia's Current Affair: "It doesn't go away. I don't think you ever stop feeling odd."
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