 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?
Got7: Got7 () is a South Korean boy group formed by JYP Entertainment. Got7:  The group is composed of seven members: JB, Mark, Jackson, Jinyoung, Youngjae, BamBam, and Yugyeom. Got7: ", which peaked at number two on the Gaon Album Chart and number one on "Billboard's" World Albums Chart.
i don't know