Lovable, adorable girl group MAMAMOO let loose and weren't afraid to act a little silly in behind the scenes video for the MV making of "Girl Crush," the OST track for mobile RPG game 'Innisia Nest'!�

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The girls, down-to-earth as ever, get in touch with their derpy sides, dancing around like maniacs, playing with a robot puppy, banging away on kiddie instruments, and laughing at their own NG cuts. Now that's how you make work fun!�

During a short interview in the clip, Hwa Sa introduces "Girl Crush," giving a short and sweet explanation for the group's bouncy new track. She says, "Our new song "Girl Crush" is about just that: crushing on a girl. We will be so thankful if everyone likes it."�