After unveiling the�album jacket cover and teaser for their 2nd mini album 'Everyday 2', 5-member girl group�Girl's Day has finally returned at full force with their new title track "Oh! My God".

The girls are back and better than ever, showing off their cute and charismatic skills on today's episode of 'Music Bank'.

Check out Girl's Day as they perform "Oh! My God" below, and view the rest of today's performances here!

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