Of course they have. If they can perform full concert and don't die half way, they're more than "average" skill. Don't you really think your Kpop idols can perform 12-20 songs non-stop? What they can is trying to perform 1-4 songs perfectly. Does Jurina want to be a singer? How can singing training make her career easier if she doesn't need to use it? lol She can quit showbiz and become anyone she wants to be. It's funny that someone think surviving in showbiz is the only way to have a happy life. Meh.