Michael Jackson by Tony Barson/WireImage.com Michael Jackson by Tony Barson/WireImage.com

Grammy Awards producer Ken Ehrlich on Sunday wants to mark the (feel old alert!) 25th anniversary of Thriller, but he's having some trouble getting Michael Jackson to fully participate. According to the New York Daily News, Ehrlich hoped to stage a musical revue featuring Jacko as well as several guest artists from the album's star-studded Feb. 12 rerelease. MJ, though, "can't go along with that," says a source. "He needs more time to rehearse new versions of the songs [and] new choreography."

Instead, Ehrlich is said to have settled for having Jackson merely appear on stage, giving fans their first good look at the always-interesting-to-look-at singer in a while. Jacko, meanwhile, is said to be saving his next song-and-dance for a money-making TV special/concert series.