Transcript for Fifth Harmony's Normani Kordei on dealing with horrific cyberbullying
Fifth harmony singer norman kordei says she has confronted racism her entire life but even she was shocked by the deluge of bigotry from anonymous internet trolls that she says drove her off social media. Her response, a deeply personal performance on "Dancing with the stars." Here's ABC's Nick watt. The first couple who will be dancing in the finals next week is norman and Val! Reporter: Earlier tonight norman kordei made it all the way to ABC's "Dancing with the stars" final three. ??? I know you're always on the night shift ??? she is of course one fraction of fifth harmony. ??? We can work from home ??? yeah. "Work from home." I felt really alone. Reporter: But it's the 20-year-old's bold confession from last week that will live so much longer in the memory. I got bullied like terribly on social media. I did an interview. It was taken out of context completely, and there were images. People were calling me like the N word. Like it was really ugly. Reporter: And the contemporary dance that inspired. ??? ??? freedom ??? she won over Len, the traditionalist. They were spellbound, and so was I. Reporter: Scored a perfect 40. 40 out of 40! ??? Looking for freedom ??? Reporter: Dancing to "Freedom" by Anthony Hamilton and Elena Boynton, the message, be yourself, love who you are, ignore the haters. Then she sat down with us. Are you ever concerned you're going to stir up the haters again? I think it's a conversation that needed to be talked about. And it's my responsibility to talk about it. Reporter: Fifth harmony was touring when normani gave this interview to "Galore" magazine. Very quirky. Reporter: That tiny pause unleashed a torrent of vile trolling. I was getting racial slander. Images of me being hung, whipped, beaten. And it really affected me. Maybe I'm just being a naive middle-aged white man, but I'm surprised at the racial aspect of this. I really am. From a younger generation. Right. Reporter: Apparently, some people thought she was dissing a bandmate. Being shady as they call it, as the kids call it nowadays. And I was not. Reporter: She apologized for any inadvertent offense. It got worse. Do you know who any of these people were who were attacking you on social media? No. Just trolls. Reporter: Sadly, cyberbullying is now an ever-present fear for middle schoolers and stars alike. Brought into sharp focus last summer when "Snl's" Leslie Jones was forced to quit Twitter after racist and misogynist trolling when the all-female "Ghostbusters" reboot came out. She tweeted "It's just too much. It shouldn't be like this. So hurt right now." Twitter took action, banned the ring leader. Then Jones' website was hacked. She hit back with humor on "Snl." If you want to see les Leon Jones naked, just ask. Reporter: Normani last summer was also rolled into quitting all social media. And I feel like then I became the more reserved and closed-off person and I get afraid of letting people in. Reporter: Normani came to fame back in 2012 on "The X factor." One of the team girls molded by Simon Cowell into fifth harmony. Young stars of the internet age. Normani kordei and Val. Reporter: That's normani's "Dancing with the stars" partner Val chmerkovskiy. The older generation isn't really understanding what that is. You know, they look at oh, it's just a computer, don't read it. You need to have a social media profile. I do. It's part of my job. Reporter: Normani was raised in New Orleans. I went to a predominantly white school, and I stuck out because I was the black girl, but I would get teased for the color of my skin and wonder why. I remember we were playing outside and the first thing that this girl, this little girl could tell me was "Leave me alone you burnt biscuit." Where do you get that from? Especially being so young. Is it worse the second-grader in the playground or the multitudes of faceless people on social media? It honestly felt the same. ??? Reporter: So does dance every Monday night on TV for entertainment and maybe just a little more. Going back to the dance I hope I was vocal enough. I think at the end of the day us as humans we just need to really be more sympathetic toward each other. Do you still get some of that hate? Yeah. Every day. What I learned in how to deal with it is recognizing that it has absolutely nothing to do about me. It's genuinely an insecurity that other people have, with ve. I was scared for so long to say exahat it is that I had felt. It's just taking courage, and luckily people have supported me, and a lot of people were inspired by my story too. Reporter: I'm Nick watt for "Nightline." ??? What a wonderful world ??? Los Angeles.
This transcript has been automatically generated and may not be 100% accurate.