"I want to stress to those people coming or thinking about coming to our city for this special event that you might consider watching this from the comfort of your own home," she said.
Earlier Friday, Los Angeles City Councilman Dennis Zine told The Associated Press he wished there had been more time to work out the logistics.
"If you can imagine 100,000 people show up and you have 20,000 capacity, there is not sufficient room," Zine told the AP. "Now you have a crowd-control problem."
Zine went on to say that the holiday weekend makes it "the worst time to work something out."
There has been no word yet on who will fund the extra police presence that the huge crowd is expected to require.
The memorial plans were announced a little more than a week after Jackson was rushed to the UCLA Medical Center, where he was pronounced dead.
Earlier today, law enforcement sources told ABC News they found the powerful sedative propofol in the home where the pop icon lived and suffered fatal cardiac arrest.
While the city of Los Angeles prepares for what could very well be one of the biggest public memorials in history, a custody battle swirls around the fate of Jackson's three children.
In Jackson's will, filed earlier this week in Los Angeles Superior court, the pop star expressed his wish that his mother, 79-year-old Katherine Jackson, be granted custody of the three children. He also named singer Diana Ross as a backup guardian if Katherine died or was unable to take care of the children.
But on Thursday, Jackson's ex-wife Debbie Rowe said that she would fight for custody of the two older children.
"I want my children," Rowe told KNBC-TV in Los Angeles.
Rowe, 50, married Jackson in 1996 after meeting him while working as a nurse in the office of Jackson's dermatologist, Dr. Arnie Klein. She conceived son Prince Michael I, 12, and daughter Paris Michael Katherine, 11, through in vitro fertilization.
In his will, Jackson specified that none of his estate should go to Rowe.
On Thursday, new details emerged about Jackson's living trust in which Jackson had placed his estate.
Jackson's trust divides all his money and assets among his three children, his mother Katherine and various children's charities, a source familiar with the estate told ABC News. He left nothing to his siblings, his father Joe Jackson or anyone else, according to the source.
Katherine Jackson will get 40 percent of his assets, and Jackson's three children will get another 40 percent. The remaining 20 percent goes to several children's charities that will be designated at a later date, a source close to the estate told ABC News.
The will made public Thursday puts all of Michael Jackson's property into this trust, which is not public.