Anne-Marie was singing "Don't Play" with KSI and Digital Animals on stage.
https://www.youtube.com/watch?v=qjQjxpnwVZw
The singer had began the performance by singing a verse from her Little Mix collaboration "Kiss My (Uh Oh)" from in front of heart at the top of a small suitcase. While walking down the stairs, Anne Marie missed a step, tripped and landed on the stage a few steps below.
After finishing off the performance, Anne Marie later tweeted “Didn’t need my left ankle anyway".
https://twitter.com/artbecomesyou/status/1491145917147541506?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1491145917147541506%7Ctwgr%5E%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.nme.com%2Fnews%2Fmusic%2Fanne-marie-reacts-brits-2022-onstage-stumble-3157002
https://twitter.com/AnneMarie/status/1491151998393401344?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1491151998393401344%7Ctwgr%5E%7Ctwcon%5Es1_&ref_url=https%3A%2F%2Fwww.nme.com%2Fnews%2Fmusic%2Fanne-marie-reacts-brits-2022-onstage-stumble-3157002