Jessica Simpson is known as one of this generations classic dumb blondes – how can anyone forget her infamous Chicken of the Sea tuna fish/chicken confusion? – but her ex-brother-in-law Pete Wentz says it’s all one big act.

The 33-year-old rocker and ex-husband of singer-actress Ashlee Simpson gave props to his former sister-in-law, calling the 32-year-old Dukes of Hazzard beauty the shrewd and savvy businesswoman behind her billion dollar empire.