Robbie Williams is "numerically dyslexic".
The ‘Let Me Entertain You’ hitmaker – who has Theodora, eight, Charlton, five, Colette, two, and Beau, six months, with his wife Ayda Field – has revealed he suffers with dyscalculia, and finds it hard to add and subtract numbers together.
He said: "I’m numerically dyslexic. I can’t add or subtract.
"I always get in trouble because I don’t know my kids’ birth dates and I don’t know our anniversary and I don’t know my wife’s birthday … I can’t even remember our house in Los Angeles. It has four digits for the start of the address and I can’t ever remember what those digits are."
Robbie also struggles to remember key dates in his life – but he has a fool proof plan to ensure he never forgets them again.
Speaking on the Three Little Words podcast, he added: "I’m going to get them all tattooed, all of those dates, so I know them and have them. ‘Cause every day is like ‘Memento’ to me."
Meanwhile, Robbie – who had previously battled with drug and alcohol addictions – recently confessed he has an "addiction" to playing golf online.
He said: "This is something I was explaining to my wife Ayda. My addictions will manifest every day. So when I wasn’t sleeping last night, I was playing golf online. It’s something I look forward to when the kids have gone to bed. It’s basically me having my two glasses of red wine …
"But with food, you have to eat it. So you are constantly triggered in some way with some form of self-abuse that you have to consume to be alive. It’s different from sex, coke and booze addiction, because you don’t have to have those things."I’m like a pack of Pringles, I am. Once I pop, I cannot stop."