Plastic surgery? Tell them to find a professional plastic surgeon who can refute the statements of Korean plastic surgeons (pioneers and leaders in their industry) who have said that SNSD look natural to them. Talk about facts, not tweenagers speculating without any training in the field.
No talent? Music Travel Lalala. That is a live performance on hostile turf where nobody will artificially improve their voices. Pre-recorded not good enough for them? Show Radio performances where again, the entire nation watches and listens to them singing live.