Ashlee Simpson is quite a busy girl these days. On top of her current summer tour, the 21-year-old singer has agreed to endorse Skechers.

Ashlee will do her first photo shoot for the footwear brand in August and her ads will run through 2007. Skechers president Michael Greenberg explained why the company chose Simpson as their spokesmodel. "Ashlee is a leading force in the music industry. She's young, beautiful, talented, and ¡­ is also the perfect union between fashion and music, using her influence to empower young women to be themselves. We were drawn to her energy, style and grace," he said.

Ashlee, meanwhile, says, "I grew up wearing Skechers. Like me, they are not afraid of taking chances and having fun. I'm happy to be a part of the brand and hope to add a few more pairs to my closet."

Skechers has partnered with musicians for years. Previous spokesmodels include Carrie Underwood, Christina Aguilera and Britney Spears.