IOI appeared on MBC Everyone's 'Weekly Idol' on August 31, where they revealed their mottos.

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Jeon So Mi revealed her motto to be, "There is not even one hair of evidence that life is sincere," and explained, "It's a motto I chose with the meaning that we should always live happily and joyfully."

Kim Chung Ha added, "There's a motto that all of the members think of.  We say this often when we're having a hard time after filming to daybreak.  We say, 'If you get a bit crazy, the world becomes enjoyable.'"

Check out some of their fun antics below.