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11 June 2012, 11:26 | Updated: 11 June 2012, 12:16
The 'Teenage Dream' singer was joined by her heavily rumoured new romantic interest Robert Ackroyd.
Katy Perry was pictured enjoying a night out in central London on Saturday night shortly after her show-stopping headline set at the Capital FM Summertime Ball 2012.
The 'Firework' singer was seen leaving the Cirque Du Soir nightclub in the UK capital in the early hours of Sunday (10th June), several hours after performing live at Wembley Stadium in front of 80,000 fans, after celebrating her successful appearance with friends.
Katy wore a sheer patterned blouse for the night out alongside a short shirt, suspender-style tights, black boots and a rocker-style leather jacket, as she left the club shortly before Florence & The Machine guitarist Robert Ackroyd, with whom she was also pictured out with in East London last week.
The 'California Gurls' singer's Summertime Ball set features all of her biggest hits from sophomore album 'Teenage Dream', as well as a surprise cover of Queen's 'We Are The Champions'.
Last week Katy surprised a group of fans in London when she unexpectedly joined them for a screening of her upcoming concert movie Katy Perry: Part Of Me 3D.
View a picture of Katy Perry out in London after her performance at the Capital FM Summertime Ball 2012 below (Credit: Goff):
View a full highlights gallery of Katy Perry's Summertime Ball 2012 performance below: