Remember we're all human and we all have our good days and bad days and days when we feel banging and other days when we feel absolutely rotten and that's ok.
As long as I'm happy with myself and mentally happy, it doesn't matter what other people think. Everyone's always going to have an opinion, you can't stop that.
Back then I just thought everyone hated me. But no, actually, they're doing it because they feel bad about themselves. So now when I look at trolls being nasty, I feel a bit sorry for them.
I would leave halfway through a photoshoot, because I couldn't bear looking at myself or being in front of a camera. I used to feel disgusted in myself.
I had a routine of waking up, going on Twitter, searching for the worst things I could about myself.
I'd become a bit of a joke. People would make memes, chopping my head off in a group photo and putting a monster or ET on there. I'd be in live Q&As and these things would pop up and I'd have to just sit there.
I could see that I was losing weight and sometimes I'd see a few good comments and that spiralled me to be like: 'This is how I need to stay.' No one cares whether your performance was good, or if you sounded great.
But it wasn't until I deleted Twitter that everything changed for me and I slowly started to feel normal again.
I went from someone who really wanted to perform from a really young age - that was all I knew - to going on 'X-Factor', which I thought was going to be the most incredible experience ever and it becoming the worst experience of my life.
I honestly think if I had been a solo artist, it wouldn't have been as bad. Because I was being compared to three other girls, it made people have more of an opinion. If I had been on my own, there would be no one to compare to.
I never had an issue with my weight or how I looked before 'X-Factor' or social media and then as soon as I got it, I slowly mentally started to believe everything people were saying about me.
I think because we were a girl group, there was such a stigma, so we had to engage with fans - social media was such a big part of our journey.
You're all beautiful in your own unique ways and there is no one in the world like you and that is what makes us special.
I will never, ever sit here and say, 'Oh my God, I'm so confident now, I love myself', because I don't.
I think I feel like a kid myself, so it's quite a scary thought having kids. I don't think I'm ever not going to feel like a child myself.
Always be yourself. There's only one you. You should embrace anything that you don't like about yourself because that's individual and that's you.Collection: Being Yourself
Your insecurities are what makes you different and who you are. If we all were the same, it'd be boring.Collection: Insecurity
I truly believe that you can do anything if you just believe in yourself.Collection: Believe
I try never to compare myself to other people. I just think this is who I am. You are happier when you think that way.Collection: Thinking
Just wear what you want, if you like something that's all that matters. Dress for yourself not for other people.Collection: People
I'm not going on a diet, I'm not trying to lose weight, because your insecurities are what make you different and if everyone looked the same, it'd be boring.Collection: Girl
You don't have to be perfect to be a popstar.Collection: Perfect
If you want to wear something, all that matters is that you love it, not what other people think. Learn to love yourself!Collection: Love You
When I was younger I got bullied about the way I looked and I thought once I was older it would stop. I hated going to school, but didn't know who to talk to about it. It knocked my confidence a lot.Collection: School