Madonna paid tribute to Michael Jackson as she described him as one of the greatest performers the world has ever known

:Madonna pays tribute to Jackson at O2 gig

• A huge picture of Jackson as a child was beamed above the stage during a short dance melody dedicated to the star as the Queen of Pop performed at the O2 Arena in London.
• One of her dancers dressed in Jackson's trademark black hat moonwalked across the stage to the delight of the huge crowd packed into the arena.
• Short versions of two of Jackson's greatest hits, Billie Jean and Wanna Be Startin Somethin, were also performed.
• Madonna then turned to the crowd and said: "To one of the greatest performers the world has ever known - Michael Jackson."
• Jackson had been due to perform 50 concerts at the O2 Arena starting later this month.
• The star died on June 25 2009 after suffering a suspected cardiac arrest.

By http://www.michaeljackson50.com/