The tribute was part of Madonna's concert Saturday at London's O2 arena.
Jackson, who died last week, was to begin a series of 50 concerts at the 23,000-seat O2 starting July 13.
A picture of a young Michael Jackson appeared on stage while Madonna was performing "Holiday," then the impersonator came on, wearing a sequined jacket, white T-shirt, white glove and white socks in the Jackson manner.
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