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21 October 2013, 14:26
The 'Unconditionally' singer celebrated her album launch with a night out in the UK capital.
Katy Perry and John Mayer partied until the early hours last night after being reunited in the UK ahead of her performance on The X Factor UK.
The 'Teenage Dream' singer gave an energetic performance of 'Roar' on the ITV show on Sunday evening (20th October), before heading out to exclusive members club Shoreditch House to continue the celebrations.
Katy opted for a gothic inspired look for her night out, in a black corset and sparkly skirt, while 'Your Body Is A Wonderland' singer John kept things simple in blue jeans and a white top.
Earlier in the weekend the couple had also been spotted dining out at Gordon Ramsey's restaurant in Battersea after John flew in from Norway to meet her.
Check out a picture of Katy and John out to dinner below (Credit: Splash):
Katy dressed in a smart pink outfit for their dinner date while John followed suit in a full suit and tie.
Katy Perry launched her new album 'Prism' worldwide this week.