I wouldn't let them sing in China either... Actually, I think that China has already done that, over a little squabble relating to a few pieces of rock in the sea, as a butthurt wannabe superpower would...

Jokes aside, do you know how many Filipinos are tricked into entering certain 'jobs' in China, under false pretences? Some couldn't even go home if they wanted to; Chinese crooks have already taken their passports. That's not just the hookers (that thought that they were going to be singers), but ayis, real singers, everything. Some of them are pretty much kept as slaves in China, on illegal visas, not paid properly etc.