LOS ANGELES, California (CNN) -- Fans wishing to attend singer Michael Jackson's memorial service next week will have to register for the 11,000 free tickets, organizers said Thursday.



Michael Jackson is shown rehearsing at the Staples Center on June 23, two days before his death.



Details on how to register for the 10 a.m. (1 p.m. ET) service at the 20,000-seat Staples Center in Los Angeles, California, Tuesday are to be announced Friday.



Jackson's family will hold a private ceremony before the public memorial service, his brother said Thursday.



Speaking to CNN's Larry King, Jermaine Jackson said the ceremony will be held Tuesday morning, but he did not say where.



Jackson rehearsed at Staples Center two nights before he died, and he appeared healthy in a video clip of the rehearsal obtained by CNN. Jackson died June 25 after collapsing at his rented home in Los Angeles.



AEG, promoter of Jackson's planned London, England, shows, released the short video of Jackson rehearsing in the arena on June 23.



Jackson sang "They Don't Care About Us," a song from his "HIStory" album, as he danced along with eight male dancers.  Watch Jackson rehearse »



Jackson did not specify where he wished to be buried in a 2002 will, which was filed in court Wednesday.  Watch CNN's Anderson Cooper talk about his interview with AEG »



More information emerged Thursday about how Jackson's estate will be shared, which his will estimated in 2002 as being worth $500 million.



The family trust created by Jackson to receive all of his assets includes his mother, his children and a list of charities, according to a person with direct knowledge of the contents of the trust.



Mother Katherine Jackson's 40 percent share would go to Michael Jackson's three children after her death, the source said.



The children -- ages 7, 11 and 12 -- also will share 40 percent of the estate's assets, and the remaining 20 percent will benefit charities designated by the executors of the will, the source said.



A judge has delayed for a week, until July 13, a hearing to decide whether Katherine Jackson will remain the temporary guardian of Jackson's children.



At a brief talk with reporters Thursday, an attorney for Jackson's ex-wife Debbie Rowe said she "has not reached a final decision" on whether she will challenge Jackson's mother for custody of Jackson's two oldest children, according to her lawyer.



A Los Angeles TV station quoted Rowe on Thursday morning saying, "I want my children."



Except for the statement to the radio station, she has not publicly indicated whether she would seek custody now that Jackson is dead.



Rowe was left out of the will.



"I have intentionally omitted to provide for my former wife, Deborah Rowe Jackson," the will said.



The will nominated Katherine Jackson, now 79, as the guardian of his children. If Katherine Jackson were to die, "I nominate Diana Ross as guardian," Jackson said in the will, written July 7, 2002.



Singer Ross, 65, was a lifelong friend of Jackson's.  Watch how the two had a close relationship »



There's also a question on when the will's executors should take over control of the late entertainer's assets, which Judge Mitchell Beckloff temporarily placed under Katherine Jackson's control.



One man named as executor is John Branca, who represented Jackson from 1980 until 2006 and was hired again before the singer's death. He helped acquire Jackson's music catalog, which is worth millions.



The other is music industry executive John McClain, a longtime Jackson friend who has worked with him and his sister Janet.



DEA reportedly joins investigation



The Drug Enforcement Administration has joined the investigation into Jackson's death, a federal law enforcement official said Wednesday night.



And the California State Attorney General's office said Thursday that it is helping the Los Angeles Police Department in its investigation. The attorney general's office said it will assist police in sifting through information in a
Who has  joined inquiry into Jackson's death? How many days before Jackson's death was the video taken? Where will Jackon's memorial be? Who joins the inquiry into Jackson's death? How many service tickets will be made available? How many memorial service tickets will be made available? Whose memorial will be Tuesday?
The Drug Enforcement Administration two nights Staples Center in Los Angeles, The Drug Enforcement Administration 11,000 11,000 Michael Jackson's
question: Who has  joined inquiry into Jackson's death?, answer: The Drug Enforcement Administration | question: How many days before Jackson's death was the video taken?, answer: two nights | question: Where will Jackon's memorial be?, answer: Staples Center in Los Angeles, | question: Who joins the inquiry into Jackson's death?, answer: The Drug Enforcement Administration | question: How many service tickets will be made available?, answer: 11,000 | question: How many memorial service tickets will be made available?, answer: 11,000 | question: Whose memorial will be Tuesday?, answer: Michael Jackson's