Jessica Simpson jet skis in stilettos.

The 35-year-old designer claims she never takes her heels off and finds that she has a better grip when wearing them.

Showing chat show host Jimmy Fallon a picture of her wearing high heels while on a jet ski with her husband Eric Johnson, Jessica said: ''I never take off a heel. I get more grip with them!''

When Jimmy argued, ''You can't jet ski with your heels!'' Jessica laughingly replied: ''I mean, when you have your own brand, why not?''

Jessica also revealed that her three-year-old daughter Maxwell is already a huge fan of high heels.

She said: ''Maxwell is wearing her first heels, which is very impressive. She's like, 'Like mama!'''

Along with Maxwell, Jessica and Eric have son Ace, two and Jessica said she found having two children in quick succession ''shocking''.

She said: ''I did it really quick and sudden. It was very shocking. Now that they're two and three, it's unbelievable.

''They're better at technology than I am - not that I'm ever good at it, but they take over people's phones and somehow find the pictures not to post.''