While Charli, whose real name is Charlotte Aitchison, starred on the mainstage, it was Green Day, who has won 96 awards and nominated for 218, which was the headliner.
When Essex-born Charli XCX, 32, took to the Brit awards earlier this month to claim her landslide five awards, she made a statement with her sheer all-black outfit, which revealed her nipples.
The singer, 32, had a huge night at the BRITs as she scooped up five gongs - and later joined the stars in descending on 180 Studios in London after the glitzy affair at the O2 Arena.
The British singer, 32, made heartfelt speeches as she took home Best Album, Artist of The Year, Song Of The Year, Best Dance Act and Best Song Writing.