The pop star/actress looked visibly upset by the frosty reception and abandoned her duties halfway through the Earls Court ceremony.
Reports claim she tumbled down a flight of stairs backstage and had to rest.
Her role was taken over by individual awards presenters, who attracted similar heckles from the audience in a largely confused and disorganized ceremony.
Sir Bob Geldof's daughter Peaches was forced back on stage after announcing an absent Shakira as World's Best Latin Artist. Peaches apologized for the winner's no-show after five minutes of empty stage, informing the arena crowd, "I just spoke to Shakira on the phone and she's thrilled."
Backstage, British girl band Sugababes had dressed in matching gold dresses expecting to be presenting an award themselves, but never made it on stage.
Band member Keisha Buchanan said at the start of the show, "I'm not sure exactly which one we're doing. We'll have to see."
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