Hilary Duff, Rihanna, Jesse McCartney and more singers from the 2000s have come a long way since their pop star beginnings.Duff skyrocketed to superstardom as the lead character on Disney Channel’s Lizzie McGuire in 2001. Two years later, she released her first album, Metamorphosis, filled with hits like “So Yesterday” and “Come Clean.”She hasn’t released a new record since 2015, but her acting career has continued to soar.