She has achieved seven Billboard Top 40 hits, three gold and two Multi- Platinum RIAA certified studio albums, four of which have reached the top 10 on the US Billboard 200. Simpson starred with her then-husband Nick Lachey in the MTV reality show Newlyweds: Nick and Jessica. She ventured into the country music market in 2008 and released Do You Know.
She has sold 20 million records worldwide. Simpson has a total of records sales in Australia of more than 426,000 copies and was ranked in the # 113 on the 1000 artists chart of ARIA Music Decade Charts (1980–2010). In 2009, Billboard named Simpson as the 95th overall best Artists of the Decade. Simpson also was ranked at number 86 on Billboard 200 Artists, solely based on album sales.