The singer will reportedly be the face of the company's new girly line, known as 'Pink'. According to Gatecrasher, Simpson beat Kelly Clarkson to get the job.
Previously Simpson was adamant that her body would remain private, despite an offer of $4 million (£2.2 million) to pose in Playboy. Speaking to PageSix, she declared: "My body is for me and for whoever my love interest is at that moment, and that's the only person who gets to see it."
"I can make $4 million somewhere else," she added.