Ashlee Nicolle Ross, (née Simpson; born October 3, 1984), is an American recording artist and actress. Simpson, who is the younger sister of pop singer Jessica Simpson, rose to prominence in mid-2004 through the success of her number-one debut album Autobiography and the accompanying reality series The Ashlee Simpson Show.

Simpson received widespread notoriety when she attempted to lip-sync with a pre-recorded vocal track on Saturday Night Live in October 2004. Following a North American concert tour and a film appearance, Simpson released a second number-one album, I Am Me, in October 2005. Her third album, Bittersweet World, was released in April 2008.