Thora wore that same dress to the <a href='http://www.dailyceleb.com/production/?view=event&eid=2251&cap=thora+birch&PHPSESSID=cd62d93c9f197e96dfe1de2503368850' target='_blank'>Revenge of the Mummy - The Ride</a> Grand opening a few weeks earlier. Maybe thats why here dress is dirty. But...