You might think superstar DJ Calvin Harris would like a drink after spending much of his time performing in nightclubs, but he is actually sober. He told the BBC back in 2009: "I stopped drinking because it actually was making me ill. It was affecting my brain in the worst way."
He later spoke more to the BBC, saying: "My live shows are a million times better now. If you drink, you can't even remember if it's a good show or not — and that's probably for the best, because it would have been rubbish because I'd have been drunk and not making any sense. The fact that people would pay to see a show and I'd not be on form - it wasn't fair. It's not fair on anyone."