09/30/2013 at 05:00 PM EDT
is a woman who gets what she wants.
"I'm a lot stronger than people think," she tells Cosmopolitan
in its November issue.
"I started my own company, invested my own money in it, and have been involved in every facet. I'm that person who says, no matter what the problem is, there's a solution. That's the way my brain is wired. If someone says to me, 'Well, that’s not possible. It can't happen,' I say, 'Yes it is. I'm going to sit here and show you that it can.' I can take no for an answer and accept it, but if there's a solution and I can make it work, why wouldn't I?"
Those tools have led her to the success she has today.
"My life is more balanced than ever," she said. "There was so much rejection in the beginning. Models are some of the most insecure people I've ever met. They're constantly being told they're not good enough. You've really got to practice loving yourself."
Part of what contributes to her fulfillment is having husband Orlando Bloom
by her side.
"Flynn says Mommy works and Daddy plays, because Daddy is in a play… so that makes sense," Kerr, 30, says of the couple's 2½-year-old son
"When I saw Orlando on Broadway
in Romeo and Juliet
, I was blown away. For someone to be able to learn all that and hold the energy to do it every day, six days a week – I have so much respect for him. We don't run lines though. We keep that very separate. That would be like me asking him to teach me how to catwalk."
Although Kerr is very busy, she sees the importance in making down time.
"Don't feel like you have to do and be everything," she said. "Let the man do some things for you, because if he cares for you, he will want to. When I get home, I'm not the boss like I am at work – I slip into a more feminine role. I take everything off and put on my Stella McCartney silk robe. I'll put on a red lip or red nails, and it lifts my mood. Sexy underwear also gives you a spark. I collect underwear from my travels. Lace, lingerie, body suits … they're like souvenirs."