f(x) member Luna revealed her thanks for winning first place with their new song.

On July 29, she posted on her me2day, "A picture of us after finishing 'PLAY! PINK TAPE'," along with a picture.

She continued, "Thanks everyone for allowing us to win first place with our new song, 'Rum Pum Pum Pum'. Please listen to the other songs on our album as well."

In the picture, f(x) Luna, Amber and Krystal and SHINee Jonghyun are smiling for the camera.