Iron Maiden: Flight 666, the documentary following the band Iron Maiden on tour in early 2008, will be screened for one day only on Tuesday, April 21, 2009 in more than 450 special digital movie theaters in 42 countries.

For a list of theaters showing the film, visit: ironmaiden.com/flight666.

Iron Maiden: Flight 666 will then be released on extended Blu-ray and DVD formats, alongside a double-CD soundtrack album and limited edition double-vinyl picture disc which will be available Tuesday, June 9.

Directed by Sam Dunn and Scot McFadyen, the film provides an intimate behind-the-scenes look at the band during the first leg of their Somewhere Back In Time tour, which spanned 23 shows and 13 countries in 45 days back in February/March 2008. The tour took them 50,000 miles round the planet playing 23 concerts on five continents in just 45 days. One of the stars of the movie is the band’s customized Boeing 757, Ed Force One, which carried the band, all their crew, and 12 tons of stage equipment and was piloted by Iron Maiden vocalist Bruce Dickinson, a fully qualified and active Airline Captain with Astraeus Airlines.

In the history of rock music, band members have come and gone, but nothing is more controversial or dangerous then installing a new lead singer in an established rock outfit. Does it help or hinder to replace your frontman or is it just plain blasphemy to even consider this practice?

This November, prog-rock band Yes will be embarking on a 40th anniversary tour without their lead singer Jon Anderson, who was forced to bow out because of illness. In Anderson’s stead on Yes’s “In the Present” tour will be Benoit David, who sings in a few Yes tribute bands out of Montreal, Canada.

Depending on fan reaction, this former tribute singer is either headed for superstardom or is very doomed.

Here’s a look at 10 rock bands that have replaced their lead singer and the subsequent outcome of their decisions.