Rookie group Bay.B, who is currently promoting with "Quecera Cera", released a practice video from before their debut, once again wowing the crowd!
They covered another talented group by singing Big Mama's "Betrayal" and "Never Mind", showing off their own powerful and mature vocals -- not to mention, impressive harmonization and diverse range.
SEE ALSO: Actress Kim Hye Soo captures attention with her slender and youthful beauty at age 55
Check out the video above and prepare to be blown away!
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