Ashlee Simpson knows her last single Outta My Head didn’t do well, in fact, she knows it sucked, but she’s not fazed. The younger Simpson has just released a new single, that will hopefully do better, called Little Miss Obsessive (check it out after the jump) - And to celebrate she performed live at The Underground in Chicago yesterday. Wearing purple skinny jeans, flats and a black zip hoodie, Ashlee looked like her old punk self.