On July 6th, Cube Entertainment artists B2ST, 4minute and G.NA headed over to VIP suite of Gimpo International Airport to be handed their official certificates for being appointed the new ambassadors of the Gimpo International Airport. All the singers graced the stage in elegant dresses and suits. However, the main attention was put on 4minute member HyunA, who transformed from her milky skin to a whole body tan for her summer solo comeback with the title track, "Bubble Pop". Check out some of the pictures from the event below! [gallery link="file" order="DESC" columns="4"] Photos: As tagged