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A Michael Jackson fan dances with thousands of other fans to Thriller in celebration of the late singer's 51st birthday in Mexico City August 29, 2009. Over 12,000 fans danced to Michael Jackson's Thriller at the event, breaking a Guinness world record. REUTERS/Henry Romero

Michael

Michael Jackson impersonators and thousands of fans dance to Michael Jackson's Beat It during the second day of celebration for the late singer's 51st birthday at the Angel of Independence Monument in Mexico City August 30, 2009. REUTERS/Henry Romero

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A Michael Jackson fan attends an event celebrating the late singer's 51st birthday at the Monument of the Revolution in Mexico City August 29, 2009. REUTERS/Daniel Aguilar

Michael

Michael Jackson impersonator Hector Jackson (C) dances with thousands of other fans to Thriller in celebration of the late singer's 51st birthday in Mexico City August 29, 2009. REUTERS/Henry Romero

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A Michael Jackson fan attends an event celebrating the late singer's 51st birthday at the Monument of the Revolution in Mexico City August 29, 2009. REUTERS/Daniel Aguilar

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A Michael Jackson fan attends an event celebrating the late singer's 51st birthday at the Monument of the Revolution in Mexico City August 29, 2009. REUTERS/Daniel Aguilar

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A Michael Jackson fan attends an event celebrating the late singer's 51st birthday at the Monument of the Revolution in Mexico City August 29, 2009. REUTERS/Daniel Aguilar

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A Michael Jackson fan attends an event celebrating the late singer's 51st birthday at the Monument of the Revolution in Mexico City August 29, 2009. REUTERS/Daniel Aguilar

Michael

Michael Jackson impersonator Hector Jackson dances to Michael's Beat It with thousands of fans during the second day of celebrations for the late singer's 51st birthday at the Angel of Independence Monument in Mexico City August 30, 2009. REUTERS/Henry Romero

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A Michael Jackson fan attends an event celebrating the late singer's 51st birthday at the Monument of the Revolution in Mexico City August 29, 2009. REUTERS/Daniel Aguilar

A

A child stands next to a picture of Michael Jackson as thousands of fans dance to Michael Jackson's Beat It during the second day of celebrations for the late singer's 51st birthday at the Angel of Independence Monument in Mexico City August 30, 2009. REUTERS/Henry Romero

Michael

Michael Jackson impersonator Hector Jackson (C) dances with thousands of other fans to Thriller in celebration of the late singer's 51st birthday in Mexico City August 29, 2009. REUTERS/Henry Romero

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A combination picture shows Michael Jackson fans attending an event celebrating the late singer's 51st birthday at the Monument of the Revolution in Mexico City August 29, 2009. REUTERS/Daniel Aguilar