Anne-Marie: 'I didn't realise how much bullying was hurting me'
Anne-Marie is known for being a chart-topping singer, both with the band Rudimental and in her own right as a solo artist.
She's been praised for writing empowering songs like Ciao Adios and Friends, encouraging her fans to be themselves and never settle for less than they deserve.
But as part of her new YouTube documentary, she's been looking back to earlier parts of her life and addressing the bullying she suffered at school for the first time.
She told Radio 1 Newsbeat about the effect it had on her mental health.
Interview by Annabel Rackham and editing by Will Chalk.