Behind-the-scenes footage of the music video shoot has been released.

A digest video of the "ALBUM DOCUMENTARY" included as a Blu-ray bonus in the limited first edition B of MCZ's 6th album "Celebration" has been released.

This time, it is a "music video ver." and the digest focuses on scenes of the members shooting music videos.

You can get to know the behind-the-scenes of the filming of "MYSTERION," "SHOWBIZ," and "HAND.

The actual bonus "ALBUM DOCUMENTARY" contains the entire album production and is about 45 minutes long.