 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:  They were formed by JYP Entertainment and released their first single "Bounce" in May 2012. Got7: Got7 () is a South Korean boy group formed by JYP Entertainment. Got7: ", which peaked at number two on the Gaon Album Chart and number one on "Billboard's" World Albums Chart.
i don't know