'NSYNC Cancel 'Dancing Machine' Performance With Jackson 5

Rehearsals for Michael Jackson concert conflict with plans for MTV Video Music Awards.

The 'NSYNC/Jackson 5 dancing machine has gone kaput.

The Celebritys have pulled out of their planned September 7 performance with the Jackson brothers at the Michael Jackson: 30th Anniversary Celebration, The Solo Years concert for logistical reasons, according to the event's organizers and 'NSYNC's label, Jive Records.

"Due to scheduling conflicts, Michael Jackson and 'NSYNC will not have time to rehearse the 'Dancing Machine' number with the Jacksons in the way Michael planned to present it," producer David Gest said in a statement Wednesday (August 22).

'NSYNC are scheduled to rehearse their MTV Video Music Awards performance (see "'NSYNC, Missy Elliott To Perform At Video Music Awards") on August 29 and 30 — the same days Jackson hoped to rehearse for his shows, according to Gest.

"The two schedules just conflict, and 'NSYNC will not be in New York prior to that," Gest said. "Michael looks forward to working with 'NSYNC in the future, as he is a very big fan of the group."

An 'NSYNC spokesperson said she had no further comment.

Organizers of the anniversary celebration have also announced additional details about the shows, which will take place at Madison Square Garden on September 7 and 10.

Jackson will perform "You Rock My World," the first single from his upcoming new album, Invincible. Comedian Chris Tucker, who is featured in the opening monologue of the song, will be part of the performance.

Aaron Carter has been added to the September 10 show, as has Whitney Houston, who was originally slated just for the September 7 show.

Other entertainers scheduled to introduce performances are Marlon Brando, Elizabeth Taylor, Samuel L. Jackson and Shaquille O'Neal. Taylor will be among 50 veteran actresses who are scheduled for a special appearance. Angie Dickinson, Patty Duke and Debbie Reynolds are among those expected.

The Jackson 5 are still slated to perform "Dancing Machine" and other numbers. It will be their first time onstage together in 11 years (see "Jermaine Jackson To Reunite With His Brothers Onstage After All").