Hey Girls is a girl group under Moai Entertainment that debuted under the name Black Queen from the label Sun Woo Entertainment. Black Queen was a very successful cover group on Youtube before they decided to debut. They have had many member changes but continue to promote as Hey Girls.

• Good Girl (as Black Queen)

• Nolja

• No One But You

• Follow Me

• Nog Yeojwo

• Yoo Hoo Hoo