Heidi Klum is a "control freak".
The blonde beauty has confessed she struggles to be spontaneous and is constantly making lists to prioritise her life and ensure her day goes smoothly.
She said: "I'm quite a control freak, and I like to stay on top of things, so I write a lot of lists too, to make sure I don't forget anything. I make a list before I go to bed, and when I get out of the shower, I even make lists when I am getting a massage."
The 41-year-old supermodel - who has Leni, 10, from her relationship with Flavio Briatore, and Henry, nine, Johan, eight, and Lou, five, with her ex-husband Seal - has to be especially organised when it comes to her kids and even works out a colour-coded timetable on her computer to keep track of the youngsters' busy schedules.
She told the Mail on Sunday newspaper's You magazine: "I have to be incredibly organised. All my children have different interests, different friends, so there are playdates, sleepovers, football, karate, dancing...
"There's always a lot of scheduling and with my work on top of that. I have to plan everything in advance. Running a tight ship and having a really solid schedule is the only way it works for me.
"On my computer I have a calendar: and everyone and everything - my work, each of my kids, holidays - has a specific colour: it looks like a multicoloured rainbow of madness and no one understands how I can make sense of it. But it really works for me."