BTOB's Changsub covered B2ST's chart-topping song "Good Luck".

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Changsub took on his Cube Entertainment labelmates and sunbaes' latest comeback track, stripping it down to just a piano and his vocals. His barebones rendition of the track definitely gives a completely different twist to the song, while priming down the number of singers to just one adds a more dramatic vibe.

Check out Changsub's cover above and the original by B2ST below!