Newly single Kelly Osbourne takes to the stage with Scissor Sisters in London

Newly single Kelly Osbourne showed she's fighting fit as she took to the stage to perform with Scissor Sisters at London's Mighty Hoopla on Sunday.The event, held at Brockwell Park, saw Kelly, 41, looking happy and healthy as she joined the American pop rock band to perform her 2005 track One Word.The band were also joined by Sir Ian McKellen and Belinda Carlisle on stage at Europe's largest LGBTQ+ music festival.Kelly looked incredible wearing a blue lamé dress with black platforms and she wore her blonde locks in a slicked back style.It was the first time her son Sid, three, had watched her perform and he was seen dancing backstage.