Simon Cowell has said the birth of his son has given him his "mojo back" after he struggled with depression.
The X Factor supremo, whose son Eric with partner Lauren Silverman was born on Valentine's Day, said the youngster's arrival had changed his life since feeling depressed in 2013.
He told the Daily Mirror: "Did a doctor say I was depressed? Yeah. I mean I knew it myself. You are always looking for the next high from the show and then actually if you haven't got anyone to share it with, or if you haven't got a family around you, you can go a bit nuts."
Simon added of life now: "Now the house is full of people, it has become a home rather than a house. There is something about the noise of people around you that triggers something back to when you were a kid in my house. That is probably what I am going through at the moment and why I am embracing it so easily.
"Everyone said it must be turning your life upside-down but I love it. I love a bit of chaos. It makes life interesting."
The music mogul said that previously he had been living a "weird existence" but has put that behind him.
He said: "In a weird way I probably needed that, I really did. You can start to live a slightly abnormal life and there is no question of doubt I was heading down that path. Too many late-night phone calls. Too obsessed with things."
Of his affair with married Lauren, he continued: "I regret that part. But then of course you have a baby and you look at the baby and you kinda go, 'This is what happened from it'.
"In this situation you are not going to come out of this well because of the circumstances. It is not something I am proud of or wanted to happen in terms of hurting anyone. It just happened.
"You have to deal with it and man up to it. You have to accept the responsibility and the criticism."
Simon, 54, went on: "My life has changed, but I am probably more focused on what I am doing now than I was a year ago, maybe because it puts things in perspective having two people in my life who I am responsible for.
"There were times last year when I would live in two rooms, kitchen and bedroom in your house. It is a weird existence when you live on your own. On the phone all night, blah blah blah."
The music mogul is known for staying close friends with his exes, who include Sinitta, Mezhgan Hussainy and Terri Seymour.
He admitted: "They probably thought I was going to become a different person, but the truth is nothing changed. We are still friends, Sinitta is a godmother, Mezhgan came over recently. Terri was there the other night [at the launch of X Factor musical I Can't Sing!].
"Can we all go on holiday on the yacht? Why not."
Simon also said his mum was shocked by the baby news, and that Lauren had been keen to call him Eric after Simon's dad.
He said of his mum: "She never thought at my age I would be turning up at Brighton with a grandson called Eric. She would never have predicted it.
"Even though Lauren had never met my dad she knew my relationship with him was very strong and she felt quite passionately that he should be named after my dad. I thought that was sweet. We told my mum before anyone else."
Refusing to rule out marriage or more kids, he added: "I wouldn't rule anything out. From here on in I am not predicting anything. The important thing this year is we have fun with what we are doing."