NY Mag reported that Simpson's various clothing and accessory lines bagged $750 million in sales last year ("To put that figure in context, it means Jessica Simpson is doing roughly the same volume in sales as Michael Kors") and WWD projects that the pop star will bring in one billion dollars next year.

Simpson confessed to the fashion newspaper, "The bigger it gets, the more stressful it gets," adding, "I'll get mad if I see something with my name on it and I don't like it. I'll say, 'Mom, did you approve that? I don't like that. I never saw that, please tell me if you approved that.'" She and her mom Tina work together on all of the collections.