 JJ Project was formed by JYP Entertainment and debuted as a part of a seven member group whose first EP peak at number one on which "Billboards" chart?
JJ Project: JJ Project (Korean: 제이제이 프로젝트 ) is a South Korean pop duo, consisting of JB and Jinyoung. Got7: ", which peaked at number two on the Gaon Album Chart and number one on "Billboard's" World Albums Chart.
i don't know