What the heck is the matter with these kids? Do you really think any of us know (or care) what his phone number is? Do you really think your parents would let you make an international call? Do you really think he's gonna answer calls from a million screaming fans? Good lord kid, get a grip!
It's unlisted. Trust me. Everyone famous gets an unlisted number to avoid getting unsolicited phone calls from millions of adoring fans. The only people I really feel sorry for are the handful of innocent bystanders listed in the phone book that happen to have the same name.