It felt when I was growing up that sport was, like, the only thing you should do... if you do music, you're really different and a bit weird.

I'm involved in music and fashion a lot more than I used to be, so my style has definitely changed - for the better, of course. It's given me greater insight into what colours work, what looks good on camera, and what I feel comfortable in.

I've only really had one period when I lost myself and felt like I was going to lose my career, and that was when I first began presenting 'X-Factor' spin-off 'The Xtra Factor' two years ago. I was worried if I did a rubbish job live on Saturday night TV that my music career was going to get affected and I would lose everything.

I'm a huge fan of 'Heart On My Sleeve' - I think it has a 'Take That' feel to it! John Shanks and James Morrison wrote the track, and we spoke to Sony and asked if we could reference a 'Greatest Day'/'Rule The World' sound to make that epic ballad. I think it does the job.

I was always an Olsen. I never thought of myself as a Brady. I never actually wanted to be a Brady. I always preferred my own family to the Bradys.

I grew up in an entertainment family, and so I saw how susceptible you are to the ups and downs of this business.

Anger at the wealth gap is no longer about dukes in horse-drawn carriages; it's about vast, tax-dodging corporations. This will not be assuaged by seeing the royal family claiming to live like we do. If anything, that will make us angrier.

Some of the pictures in 'The Human Face of Big Data' will bring tears to your eyes; others are so surprising or memorable that you just have to show them to your friends and family.