Which sister had the more successful singing career?
Jessica Simpson and Ashlee Simpson have both entered the world of acting and singing, with Jessica clearly topping her sister in the acting category. Which sister is the more dominant one when it comes to music though? Both of their most successful albums sold three million copies in the United States. Jessica had more single success while Ashlee got two Billboard 200 number ones, something Jessica failed to do. So which of the two had the most success? Discuss.
