Joe McElderry thinks computers made him over weight

X Factor finalist Joe McElderry has spoken out about being over weight when he was younger.

‘About two years ago, I lost two stone in weight,’ tells Joe.

‘At 15 I decided to start a healthy eating plan. It was prompted by just feeling I didn’t have any energy.

‘I was an active child, but when I hit my teens I discovered computers and the weight just piled on.’

‘One day I suddenly looked in the mirror and thought “Oh my god, I have a flat stomach,”‘ he tells Great Ormond Street Hospital’s Teens First For Health. ‘It was amazing.

‘I would never let myself get back to that weight now. I’m not saying I don’t fluctuate from week to week, but I am much more aware of my body now and listen to it.’