Celebrity guests are split into two teams to compete in various contests. One guest, known only to himself, is designated the "X-Man", and does his best to cause his team to lose the contests. At the end, all guests try to determine the X-Man's identity.

Mama The Idol provides former K-Pop stars who have stepped down from the stage another chance to sing and dance as an idol. This program features former Wonder Girls member Sun Ye who announced her departure from the group after her marriage, former After School member Kahi who moved to Bali after her marriage, and former Jewelry member Park Jung A. It’s been years since these former idols gave up their careers on the stage to move on to other chapters of their life. But they’ve decided that they would do anything to perform on stage again like they used to during their K-Pop idol days.