Ashlee Simpson has ordered the male musicians in her band to take showers every day and use deodorant.

The PIECES OF ME singer is preparing to hit the road to promote her new album I AM ME, and she's laid out some strict hygiene rules for her band members.

She says, "(I'll be on the road) with five boys. And we have rules. Before we went on tour, I was like, 'Okay, no stinky shoes, everybody has to shower every day,' because they can start smelling really bad. And I said, 'When we're done with the shows you put deodorant on!'

"I'm telling you, these rock star boys, when they go out on the road, they'll go like nine, ten days without showering."