Ashlee Nicole Wentz , better known by her former stage name Ashlee Simpson and now professionally known as Ashlee Simpson-Wentz (born October 3, 1984 as Ashley Nicole Simpson), is an American pop rock singer-songwriter, and occasional actress. Simpson-Wentz, who is the younger sister of pop singer Jessica Simpson, rose to prominence in mid-2004 through the success of her number-one début album Autobiography and the accompanying reality series The Ashlee Simpson Show. Simpson received widespread criticism when she used 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.