Kim Byung Joo, or as he is better known to his fans, B-Joo, is a member of the ten piece K-pop boy band Topp Dogg.
He was the first official member of Topp Dogg to be revealed after four years as a trainee.
Before joining Topp Dogg, he appeared in the video "Should We Get Married?"
He was born and raised in Seoul, South Korea.
In 2014, he was twice seen on Let's Go Dream Team with bandmates Sangdo and Hojoon.