The American beauty, 32, put on a busty display in a pin-striped Versace suit with a plunging crop top as she sang the catchy pop tune.

A makeshift housing estate moved to the sound of the beat as Katy roamed between dancers inside the pop-up buildings.

The blonde was comfortable in trainers, accessorising with a dazzling Sif Jakobs Jewellery ring, and her hair worn out in shaggy waves.

Giant skeletons dressed as Donald Trump and Theresa May, after the Prime Minister’s recent visit to the US, were introduced later on in the performance, with their operators skilfully propelling them to the centre of the stage.

Katy’s performance wasn’t quite incident free, however, as one of her backing dancers walked straight off the stage with their view seemingly impaired by the house which they were within.

Skip and Katy held each other’s hands triumphantly aloft as the final notes rang out as the audience applauded.

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