I believe you may be referring to "KPOP Star 2," which was a South Korean television show that aired in 2012. It was the second season of the original K-pop Star reality show, which aims to find the next big star in the K-pop industry.
The show featured talented young individuals competing for a chance to debut as a K-pop artist under one of the big entertainment companies in South Korea. The mentors for the first season were Yang Hyun-suk, a founder of YG Entertainment; Park Jin-young, founder of JYP Entertainment; and Lee Soo-man, founder of S.M. Entertainment.
However, please note that my information might not be up-to-date, and there have been subsequent seasons and changes since then. If you're looking for more specific or current information, I'd recommend checking the most recent sources.