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 debut album Autobiography and the accompanying reality series The Ashlee Simpson Show. Simpson received widespread criticism when she us.