BLOCK B's Zico says sorry as his voice cracks while singing on Music Core

Block B's Zico went on his Twitter to express his apology.

Zico extended his sorry because his voice cracked when he sang his part in 'Rare Woman' on 'Music Core.' He wrote on his Twitter, "Live Rare Woman...ㅜㅜI'm sorry..My vocal cords weren't in good condition ㅜㅜㅜㅜ We'll do a live performance of 'Rare Woman' when our condition improves!!"

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