Hector Jackson (C), who impersonates the late US pop star Michael Jackson, dances during the 'I do dance Thriller' event aimed at breaking the Guinness record for the biggest mass 'Thriller' dance, in Mexico City, on August 29, 2009. According to the organizers, 12,937 Mexicans set the new Guinness World Record on a mass performance of Michael Jackson's famed 'Thriller' dance on the day he would have turned 51.