Girl group GLAM steps up their game with a new concept called a "banner concert."

A "Banner Concert" is when artists go into a box and perform.

GLAM is the first girl group to try this new concept. On July 9 they released a video of themselves showing their full ability to play instruments and sing inside a box.

They were seen barefoot, lying on the ground playing a guitar and happily playing the djembe, all carefree and full of energy.

It's also been said that the song GLAM sings is not one that's already existing; it will appear as a new song on their debut album.

GLAM will hold their first fan meeting on the July 13.