Los Angeles (CNN) -- Justin Bieber's recent arrests and alleged pot-smoking antics on an airplane raise the question: Who's in charge?
Can parents stand a chance of keeping their kid in line if he's a highly paid teen celebrity?
CNN interviewed two celebrity parents and two professionals who help young stars after they crash about why parenthood is perhaps the toughest role in Hollywood. They point to predators, parasites and parents who don't act like parents as culprits.