Rocker Ozzy Osbourne's son Jack has discovered a huge downside to his successful sobriety - he now finds parties "boring".
The 18-year-old reality TV star entered a rehabilitation centre last year to beat his addiction to painkillers, and while he's proud of overcoming his dependency, his decision to also give up alcohol has made his social life comparatively tame.
He says: "Parties are a little more boring since I stopped drinking."
But there has been one advantage - his healthier lifestyle has helped him shed 6.8 kilograms (15 pounds).
He adds: "(My secret is) small meals five times a day and working out two hours a day."