Harry, 22, said they asked Elton John to play "Candle in the Wind," the song he sang at Diana's 1997 funeral. Originally about Marilyn Monroe, its lyrics were reworked in tribute to Diana and it became a worldwide No. 1 hit that same year.
"This evening is about all that my mother loved in life: her music, her dance, her charities and her family and friends," William told the crowd, thanking them and millions more who watched the show on television.
Diana died Aug. 31, 1997, along with her boyfriend Dodi Fayed and their driver when their car Mercedes crashed inside the Pont d'Alma tunnel in Paris with media photographers in hot pursuit.
Security for the event was increased after the discovery of two unexploded car bombs in central London on Friday and an attack on Glasgow airport on Saturday. At least 450 officers patrolled the concert.
The concert mixed rock, pop, hip hop and classical ballet and featured some of Diana's favorite acts including Duran Duran and Tom Jones.
Among the 24 performances were songs by Rod Stewart, Kanye West, Joss Stone, Lily Allen and Sean "Diddy" Combs, who performed an emotive rendition of "Missing You" .
"Ten years ago Princess Diana, she went to a better place, and today we celebrate her rebirth," Combs said. "I love you Diana, we miss you."
Ex-British prime minister Tony Blair was among those who recorded a video greeting. His message wasbooedas he appeared on screen, but the crowd cheered when he paid tribute to William and Harry.
"I know their mother would be very proud of them," Blair said.
William's former girlfriend Kate Middleton attended the concert, further fueling rumors that the couple, who announced their split in April, have reconciled.
