SOLD-OUT SHOWS

Jackson had been due to start a series of concerts in London on July 13 running until March 2010. The singer had been rehearsing in the Los Angeles area for the past two months. The shows for the 50 London concerts sold out within minutes of going on sale in March.

"Rarely has the world received a gift with the magnitude of artistry, talent, and vision as Michael Jackson," said Neil Portnow, president and CEO of The Recording Academy in a statement.

"He was a true musical icon whose identifiable voice, innovative dance moves, stunning musical versatility, and sheer star power carried him from childhood to worldwide acclaim."

There were concerns about Jackson's health in recent years but the promoters of the London shows, AEG Live, said in March that Jackson had passed a 4-1/2 hour physical examination with independent doctors.

Outside the hospital in Los Angeles about 200 fans and reporters gathered on Thursday, waiting for confirmation of Jackson's death or condition.

Some fans were crying and hugging each other, and others were climbing atop fences to get a better look at a microphone stand where a news conference was supposed to take place.

"I hope he's gone to God, and I hope that he's free of all the troubles he's been plagued with," Tonya Blazer, 50, who said she had been a fan going back more than four decades to his days as a child star.

"I just feel like I'm paying tribute to him," said Dawn Burgess, 42, a fan who said she had posters of Michael pinned to her bedroom wall when she was a child.

CHILD STAR TO MEGASTAR

Jackson was born on Aug. 29, 1958, in Gary, Indiana, the seventh of nine children. Five Jackson boys -- Jackie, Tito, Jermaine, Marlon and Michael -- first performed together at a talent show when Michael was 6. They walked off with first prize and went on to become a best-selling band, The Jackson Five, and then The Jackson 5.

Jackson made his first solo album in 1972, and released "Thriller" in 1982, which became a smash hit that yielded seven top-10 singles. The album sold 21 million copies in the United States and at least 27 million worldwide.

The next year, he unveiled his signature "moonwalk" dance move while performing "Billie Jean" during an NBC special.

In 1994, Jackson married Elvis Presley's only child, Lisa Marie, but the marriage ended in divorce in 1996. Jackson married Debbie Rowe the same year and had two children, before splitting in 1999. The couple never lived together.

Jackson has three children named Prince Michael I, Paris Michael and Prince Michael II, known for his brief public appearance when his father held him over the railing of a hotel balcony, causing widespread criticism.

New Yorkers and tourists in the city's Times Square were shocked at the news of Jackson's death.

"I don't know what to say. It's sad, it's really, really sad," said Nicole Smith, an 18-year-old student from Brooklyn, New York, in Times Square. "My mother was a fan. I listened to his music."

"I'm shocked. I thought someone was lying to me when I first heard it. I was a fan from when he was a little boy and then he got weird," said Sue Sheider, 51, a teacher from Long Island.

(Additional Reporting by Jill Serjeant in Los Angeles and Michelle Nichols in New York)

FACTBOX - Key facts about Michael Jackson

Michael Jackson, 50, one of pop music's biggest stars, was rushed to a Los Angeles-area hospital by paramedics who found him not breathing when they arrived at his home, the Los Angeles Times said, quoting fire officials. The TMZ website reported later he had died.

There was no official confirmation of the reported death, and spokesmen for Jackson could not be reached for comment.

Here are some key facts about Jackson.

EARLY LIFE:

* Jackson was born on Aug. 29, 1958, in Gary, Indiana, the seventh of nine children. Five Jackson boys -- Jackie, Tito, Jermaine, Marlon and Michael -- first performed together at a talent show when Michael was 6. They walked off with first prize.

* Their group later became The Jackson Five, and when it was signed by Motown Records in the late 1960s it underwent its final metamorphosis to become The Jackson 5. Jackson made his first solo album in 1972.

SUCCESS:

* Jackson released "Thriller" in 1982, which became a smash hit that yielded seven top-ten singles. The album sold 21 million copies in the United States and at least 27 million worldwide.

* The next year, he unveiled his signature "moonwalk" dance move while performing "Billie Jean" during an NBC special.

* Jackson's lifetime record sales tally is believed to be about 750 million, which, added to the 13 Grammy Awards he has received, makes him one of the most successful entertainers of all time.

ACCUSATIONS:

* In 1993, Jackson was accused of sexually abusing a 13-year-old boy, and police raided his California ranch "Neverland."

* The same year, Jackson announced he had become addicted to painkillers and abruptly canceled a world tour to promote his album, "Dangerous."

* He reached a settlement in 1994, later reported to be $23 million, with the family of the boy he was accused of abusing.

MARRIAGE & FAMILY:

* In 1994, Jackson married Elvis Presley's only child, Lisa Marie, but the marriage ended in divorce in 1996. Jackson married Debbie Rowe the same year and had two children, before splitting in 1999. The couple never lived together.

* Jackson has three children named Prince Michael I, Paris Michael and Prince Michael II, known for his brief public appearance when his father held him over the railing of a hotel balcony, causing widespread criticism.

MORE CONTROVERSY:

* A television documentary "Living with Michael Jackson" was aired in 2003, saying that Jackson still had sleepovers with young boys and had his third child with a surrogate mother. Jackson aired his own rebuttal.

* Jackson went on trial in 2005 on charges of molesting a 13-year-old boy in 2003, as well as conspiring to abduct the boy. The singer faced nearly 20 years in prison if convicted.

* The four-month trial ended in June 2005 with his being acquitted of all charges. Jackson has spent time in Bahrain, Ireland and France since the child molestation case ended.