Choo Seung Youp a South Korean singer, guitarist and member of rock band ACHTUNG (악퉁). He obtained a master's degree in Arts Management from Chung-Ang University. He made his debut in 2008 as the band's frontman and leader with their 1st album, also named "Achtung". He is also involved in producing, composing and arranging and, alongside the other 2 band members, he runs the Achtung Practical Music Academy. In 2023, he participated in the singing survival competition "Sing Again 3" and finished in 7th place.

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