The red-haired singer-songwriter performed at the Weston Park venue on Saturday, 16 August before travelling to Chelmsford for the Hylands Park leg of the music festival.
Afterwards, she was snapped enjoying the hospitality of the star-studded Mahiki Rum Bar situated next to the exclusive Virgin Media Louder Lounge.
Katy switched from her sexy stage outfit of sheer polka dot shirt and black trousers to a summery patterned dress and comfy trainers as she enjoyed a cocktail in a pineapple (jealous!) and ice lolly backstage.
She'd come straight from performing at the MTV Stage, where she attracted a massive crowd to her fantastic and energetic set featuring tracks including 'Anywhere In The World' and 'Crying For No Reason'.
Later on, she performed again, this time giving an acoustic set at the Carling Roadies stage within the main festival arena.
Busy weekend for Katy!
Which celebs hit the exclusive Louder Lounge this weekend? See the gallery below!
Copyright: Rex Features AKEM
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