Harry and Kelly party together

Kelly Osbourne, Harry Styles, Daisy Lowe and Nick Grimshaw

Harry Styles and Kelly Osbourne let loose at a karaoke birthday party in London last night.

Having attended London Fashion Week shows earlier in the day, Harry was out again to celebrate Pixie Geldof turning 23. Kelly quickly got into the spirit of the bash and tested her vocal talents by belting out Bonnie Tyler’s Total Eclipse of the Heart.

Pixie posted a photo of the fashionista looking casual in a grey sweater as she took over the mic for a song, accompanied by model Jack Guinness and designer Henry Holland.

While Harry is best known for topping charts around the world with his band One Direction, he wasn’t seen near the karaoke machine.

However, the heartthrob did enjoy dinner with Pixie, Kelly, model Daisy Lowe and DJ Nick Grimshaw.

Pixie – daughter of singer Bob Geldof – shared a photo of the star-studded group captioned ‘Birthday dinner pals!!!!!’

The karaoke and cocktails bash took place at London’s exclusive Dorchester Hotel. Guests enjoyed themselves until the early hours of Wednesday, with Pixie seen leaving the party with a male pal while Harry exited a short time later.

Harry has been a regular at London Fashion Week, often being spotted on the front row of big shows. Earlier this week, he attended Burberry Prorsum’s catwalk event to support his rumored girlfriend, British model Cara Delevingne.

However, the 19-year-old singer denied romance speculation when he was quizzed about his relationship with the blonde beauty.

“She’s not my girl! I know what you’re doing,” he told MTV News.

Yesterday, Harry watched the Fashion East show held in the Topshop Space along with birthday girl Pixie and Cara’s sister Poppy Delevingne.

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