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5 August 2014, 12:46
Watch the special moment R Kelly and Chance performed 'The World's Greatest,' 'Ignition' and 'Bump N' Grind.'
The Lollapalooza surprises continued this week during Chance The Rapper's show when he brought out R Kelly mid-way through his set for a special collaborative performance.
Both R Kelly and Chance had the crowd going wild when they performed a medley of three of R Kelly biggest hits; 'The World's Greatest,' 'Ignition (Remix)' and 'Bump N' Grind.'
Watch the amazing performance above.