The Hall-of-Fame group hasn't released a new album since 1989.
The Associated Press
BURBANK, Calif. — Guided by a thumping 
bass  line from their backing band, the Jackson brothers strut forward 
to a  row of four microphones, thrusting their pelvises along the way, 
before  launching into "Can't Let Her Get Away," a song their superstar 
sibling  released on his "Dangerous" album. 
click image to enlarge
This June 12, 2012 file photo shows,
 from left, Marlon Jackson, Jackie Jackson, Tito Jackson and Jermaine 
Jackson during a rehearsal in Burbank, Calif.  Nearly three years after 
Michael Jackson died while staging his comeback, four of his brothers - 
Marlon, Jermaine, Tito and Jackie - are preparing for their own return 
to the stage. (Photo by Todd Williamson/Invision/AP)
            
 
If they had afros and matching powder  blue suits, it might feel like 1977 again.
It doesn't. They're  casually sporting sunglasses, workout gear and a
 few more pounds than  when they, along with the future King of Pop, 
were simply known as the  Jackson 5. (Also, "Can't Let Her Get Away" was
 released in 1991 after  the group fizzled out.)
Nearly three years since Michael died  while preparing for his 
comeback tour, four of his brothers — Marlon,  Jermaine, Tito and Jackie
 — are set for their own return to the stage as  The Jacksons. It hasn't
 been easy.
"The brothers don't know this,  but I've broken down several times 
and cried during rehearsals," said  Jermaine during a recent rehearsal 
break on a soundstage in Burbank,  Calif. "I'm so used to Michael being 
on the right and then Marlon,  Jackie, on and on. It's just something we
 never get used to."
The  brothers are launching their "Unity" tour on Wednesday, five 
days ahead  of the third anniversary of Michael's death from an overdose
 of the  anesthetic propofol on June 25, 2009.
"For me, this cycle that  comes around every year — this day, that 
day — that doesn't affect me  because it affects me every day," said 
Marlon. "When that day comes  around, it's the same. You learn to live 
with it. I still wake up  sometimes and go, 'Jeez. I can't believe my 
brother's not here.'"
Following  Michael's death, the four brothers appeared in the A&E
 reality  series "The Jacksons: A Family Dynasty," which chronicled 
their loss and  attempt to stage a comeback before their brother died.
Jermaine  said the brothers have wanted to reunite on their own for 
years, but  after Michael's passing, they needed time to heal — and the 
tour is  another 
step
 in that process. They've rearranged their classics to suit  their 
voices, and Jermaine said the group plans to pay tribute to  Michael 
during their shows with a slideshow and medley that will  conclude with 
the tune
 "Gone Too Soon." 
"There's certain songs  that make you feel the sorrow,"
 said Tito. 
"Then again, there are other  songs that bring so much joy and 
happiness, such as 'ABC' and 'I Want  You Back' and the up-tempo stuff 
like 'This Place Hotel.' I just imagine  how he used to walk and spin 
and do all these things. You can feel his  presence here."
The Jacksons' tour kicks off at Rama 
Casino
 in  Ontario, Canada, and is scheduled to end July 29 at the Snoqualmie 
 Casino Amphitheater in Snoqualmie, Wash. Other stops include Detroit's 
 Fox Theatre, Los Angeles' Greek Theatre and Harlem's sold-out Apollo  
Theatre, where the Jackson 5 won an amateur night in 1969 before  
rocketing to fame.
Michael later forged unprecedented success as a  solo artist. His 
superstardom was unrivaled, and his brothers couldn't  capture similar 
acclaim or sales with their solo projects or last studio  album, 1989's 
mostly Michael-less "2300 Jackson Street," but their  legacy as a group 
has remained unchanged. The Jackson 5 were inducted  into the Rock and 
Roll Hall of Fame in 1997.
While various  combinations of the brothers have reunited to perform 
over the years,  including at last year's "Michael Forever" tribute 
concert in Wales,  "Unity" will mark the first time the brothers have 
toured together since  their final "Victory" outing in 1984. (Marlon 
said Randy, who  officially joined The Jacksons in 1975, elected not to 
join the tour but  noted that the youngest Jackson brother was welcome 
at any time.)
"We  have a certain magic," said Jackie. "Once we get out here and 
run it  down a couple times, it comes back to you. I'm not (moving) like
 I used  to, but we still got it."
Will the fans think so — and will they  turn out to see The Jacksons,
 whose ages now range from 55 to 61,  perform their hits without 
Michael?
Last year, Cirque du Soleil  launched "Michael Jackson: The Immortal 
World Tour" in Las Vegas. The  show featuring dancers and acrobatic acts
 performing routines set to  M.J. tunes has been among the top touring 
acts this year, and "Immortal"  will return to Vegas for a residency at 
the Mandalay Bay Hotel and  Casino.
However, Gary Bongiovanni, editor-in-chief of concert  industry trade
 publication Pollstar, doesn't believe The Jacksons will  achieve 
similar success with their smaller endeavor.
"The Jacksons  were really all about Michael," said Bongiovanni. "The
 Cirque du Soleil  show was successful because it was Cirque du Soleil 
and Michael's  music. I don't know if that portends much for the 
remaining brothers and  their ability to generate enthusiasm for ticket 
sales."
The brothers are undaunted, hoping to release an album of new music then go back out on tour.
"It's like riding a bike," said Marlon. "You never forget, but you do need to tweak a few things."