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The young ladies will be challenging their girl group seniors Red Velvet and G-Friend by showcasing their title track 'MO MO MO' at 3 times the original speed!

Formerly, both Red Velvet and G-Friend were successful in performing their own choreographies at 2 times their original speeds.

Tune in to see if Cosmic Girls will succeed at their challenge, and more on March 23's 'Weekly Idol'!!