Nine-year-old Kim Si-yoon has no time to throw tantrums.
She wakes up at 7:30 a.m. for school, followed by hours of voice training, dance lessons and cram school before crashing into bed at midnight. Si-yoon is a wannabe K-pop star.
Thousands of Korean children dream of becoming household names like rapper Psy, whose 2012 "Gangnam Style" video was a global YouTube hit, often putting up with punishing schedules in the hope of one day making it big in the music industry.
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