In the clip, the singer recalls the constant cruelty she suffered at the hands of trolls after winning The X Factor with her bandmates in 2011.
“I think everyone needs to know the effects of what online trolling can do to people and how bad it can really get,” Nelson says in the clip. “I wasn’t known as just one of the singers in Little Mix; I was known as the fat, ugly one. It literally consumed every part of me.”
While filming the documentary — which premieres during National Suicide Prevention Week in the U.S. — the star met with dozens of teens and young adults who’d suffered their own bullying in an effort to share their stories. Now, Nelson says her mission is to empower others to get help and heal from the trauma.
“I always used to look at the other girls in the group and think, ‘God, I’d just love to know what it feels like to be you,’” Nelson reveals. “And I thought, ‘God, there must be so many girls that wake up and still feel like that, and think there’s not a light at the end of the tunnel.’ And I wanted to make [the documentary] for people to know that there is. If you talk to people and you get the right help, you will be able to feel better again one day.”
Odd One Out will premiere on Thursday (Sept. 12) on BBC 3 and BBC 1. Watch the full trailer for the documentary below.