Kevin Woo, who is the singing voice for Mystery Saja, posted a solo version of Your Idol. Kevin is originally from California. After being discovered, he moved to South Korea to become a kpop trainee. He was in XING and U-KISS before going solo. He starred in the Korean adaptation of the off-Broadway musical Altar Boyz, the 2017 Japanese production of Maybe Happy Ending, and made his Broadway debut in KPOP.

Over the summer, he posted a solo version of the KPop Demon Hunters song Soda Pop (complete with a Mystery outfit).

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