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As she finalised her divorce to comedian Russell Brand, Katy was pictured out at a 90s themed roller disco party for celebrity stylist and good friend Johnny Wujeck.
The 'I Kissed A Girl' singer arrived to celebrity stylist Johnny Wujek's party with a big bag of teddy bears in her backpack. Picture: WENN
The star was seen showing off her best dance moves as she zoomed around the dance floor on a pair of roller skates with her arms in the air. Picture: WENN
The American star wore a flowery outfit complete with cream shorts, pink sunglasses and a purple backpack as she partied with the new America's Next Top Model judge. Picture: WENN
The singer takes a moment to pose for a picture with the celebrity stylist, who was celebrating his birthday at the MoonLight Rollerway in Los Angeles. Picture: WENN
The star studded event was also attended by the likes of Amber Heard, Hayden Christensen and Rachel Bilson. Picture: WENN
After helping to light the candles, the singer lead the celebrity guests through the traditional 'Happy Birthday' song as the venue erupted with applause. Picture: WENN