How Simon Cowell Unwinds (and Stays Clean!) at Home
09/30/2011 AT 04:15 PM EDT
"I'll do 500 push ups in a day religiously, and if I can I like to have a workout," the host of The X Factor tells PEOPLE. "Then I have a steam and a bath but I always have breakfast in bed."
For Cowell, 51, the most important meal of the day consists of a cup of hot water with lemon ("very good to flush out all the crap in your system," he explains), fresh papaya juice with squeezed lime, and oatmeal.
Because a typical workday starts around 1 or 2 in the afternoon and ends after 9 p.m., Cowell says he's become quite a night owl. But there's one thing he can always count on to wind down: "Beer. A lot of beers. Sapporo is a favorite."
"I have a weird routine," he admits. "I'll have a massage and then I'll have four or five beers ice cold … then I'll carry on until 4 or 5 in the morning and that kind of keeps me awake."
And it's in those wee hours that his creative juices really start flowing.
"I always know what time I normally fall asleep based on my last text," Cowell says. "I'm actually very on it at that time of day. … Last night I was sending thoughts on promos, edits. I mean, I like doing that."
Apparently Cowell's fastidious nature on his TV shows extends to his personal hygiene.
"I'm obsessed with cleanliness for myself, so I will take a bath three times a day, sometimes a steam twice a day in addition to that," Cowell says. "And the same thing in the house. … "I don't like clutter. That's why I think I'd find it difficult to have kids."
"Your house, I think, defines your mind," he added. "If you come into something which is chaotic, it means your head is chaotic, and I can't work that way."
For more photos inside Cowell's L.A. retreat and a look at where Lauren Conrad, Cher, Tia and Tamera Mowry and more call home, pick up the latest issue of PEOPLE, on newsstands now