Worldwide premiere - London

A Michael Jackson impersonator poses at the UK premier of Michael Jackson's "This Is It" at the Odeon in London's Leicester Square. Michael Jackson delivered a posthumous thriller Tuesday as fans flocked to worldwide premieres of a documentary film billed as the final concert performance of the King of Pop.

Fans queue up to enter the Michael Jackson Exhibition at the O2 venue in London, Wednesday Oct. 28, 2009. Wednesday was the first day the exhibition opened to the public, with around 250 of the late US performer's personal items on display

A fan strikes a pose as he queues up to enter the Michael Jackson Exhibition, at the O2 venue in London, Wednesday Oct. 28, 2009.

Michael Jackson fans around the world readied for the singer's last bow Tuesday in a film that captures rehearsals for his aborted concert stand last summer.

From early evening in Los Angeles to late night in New York City, from the pre-dawn hours in Europe to business hours in Asia and elsewhere, "Michael Jackson: This Is It" arrives simultaneously in the biggest cinematic blowout ever for a music film.

Opening in 99 countries Tuesday and Wednesday, the film expands to 110 territories by this weekend, with distributor Sony putting 15,000 prints of "This Is It" into circulation.

A Michael Jackson impersonator poses at the UK premier of Michael Jackson's "This Is It" at the Odeon in London's Leicester Square. Michael Jackson delivered a posthumous thriller Tuesday as fans flocked to worldwide premieres of a documentary film billed as the final concert performance of the King of Pop.