Reuniting the Jackson 5 is not as easy as one, two, three.

One of the original five — and the added sixth member — may not appear with the group as planned for the "Michael Jackson: 30th Anniversary Celebration, The Solo Years" on September 7 and 10.

Jermaine Jackson and Randy Jackson sent a letter to the media on Friday criticizing the concerts, which will feature Michael performing in the U.S. for the first time in 11 years, along with an all-star lineup of 'NSYNC, Britney Spears, Whitney Houston and more (see "Missy Elliott, Ricky Martin, Mary J. Blige Added To Michael Jackson Tribute").

The brothers, who are scheduled to perform with the other four Jacksons on stage for the first time since their 1984 Victory Tour, addressed their concerns about the prices of tickets for the events, which top out at $2,500.

"The exorbitant ticket prices being charged by the promoters will prevent some of our most loyal and true fans from attending the shows," Jermaine and Randy Jackson said. "Further, it is almost embarrassing that no charities have been named to benefit from this most momentous occasion." In response to their letter, David Gest, president of the concerts' organizers, World Events LLC, issued a statement saying that Jermaine would not participate in the Jackson 5 reunion. He did not mention Randy, who was not an original member of the group.

"I am sorry Jermaine has chosen not to participate in this event," Gest said. "This is an event for Michael Jackson. It is a salute to a truly great and legendary artist. Jackie, Tito and Marlon, original members of the Jackson 5, will join their brother Michael onstage for this very special reunion... I only wish Jermaine the best on his solo career and hope he finally gets the attention he so justly deserves." Still, a spokesperson for the Jackson family told Reuters Friday that Jermaine and Randy may still perform. Although they have yet to sign a contract, "Jermaine and Randy are planning on attending their brother's event and performing with their brothers on stage," John McLaughlin said.

"That letter that Jermaine and Randy released basically raised some concerns about the ticket prices for the shows and was pointed at the promoters, not Michael," McLaughlin added.

Jermaine's manager told the Associated Press that Jermaine had not dropped out, he just wanted to make sure early supporters of the Jackson 5 would be invited.

Jermaine and Randy wrote that they were unhappy about the "endless list of celebrities" lined up for the concerts.

"[Fans] were looking forward to us performing our greatest hits together without assistance from any other act," they wrote. "Performing together has been something that all the brothers and our parents have been looking forward to for 18 years. [We] do not think we should share this most precious and memorable moment with anyone." Tickets for both performances go on sale July 31 at 10 a.m. through Ticketmaster.

The lineups for the two concerts, according to the publicists: September 7:

  • Marc Anthony
  • Ray Charles
  • Deborah Cox
  • Gloria Estefan
  • Billy Gilman
  • Whitney Houston
  • James Ingram
  • Quincy Jones and the Legends of Jazz, including Al Jarreau, Herbie Mann, Les McCann, David "Fathead" Newman, Jimmy Smith, Clark Terry and Cassandra Wilson
  • Monica
  • Mya
  • 'NSYNC
  • Jill Scott
  • Shaggy featuring Ricardo "RikRok" Ducent and Rayvon
  • Britney Spears
  • Tamia
  • 3T
  • Usher
September 10:
  • Marc Anthony
  • Mary J. Blige
  • Deborah Cox
  • Missy "Misdemeanor" Elliott
  • Gloria Gaynor
  • Al Jarreau
  • Gladys Knight
  • Lil' Romeo
  • Ricky Martin
  • Monica
  • Mya
  • 98 Degrees
  • Jill Scott
  • Usher
  • Luther Vandross
  • Dionne Warwick