Nandi Bushell has performed a rock medley at the O2 Arena in front of 20,000 people – watch footage from the performance below.Recently, Bushell performed at the O2 Arena as part of the Young Voices youth choir tour, which played to a total of 600,000 attendees across the UK. Backed by the choir and a house band, Bushell performed a medley that consisted of classics from The Who, Metallica, Foo Fighters, Nirvana and many others.This past weekend, Bushell uploaded a clip of her performance onto YouTube, titled ‘The Greatest Rock Medley Ever!’.The medley kicked off with The Who’s ‘Won’t Get Fooled Again’, before transitioning to The Killers‘ ‘Somebody Told Me’.