Ed Sheeran, Demi Lovato, and One Direction are other global superstars performing on the night, and the cast of musical Miss Saigon, and hit cabaret La Soirée are also giving us a number.
Michael McIntyre is our host and other comedy on the night comes from Jack Whitehall, Sarah Millican and Trevor Noah.
Also, Britain's Got Talent winners Collabro claim this part of their prize as they take to the stage to perform.
The Royal Variety Performance 2014, ITV, 7.30pm
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