IU's morning call on 'Running Man' has become a hot topic of conversation online.

On the episode of SBS's 'Running Man' that aired on January 15th, IU woke up the other guests on the show by singing to them live, bright and early in the morning.

The 'Running Man' cast who had just woken up had expressions of wonder and disbelief as they ran outside of the pension to see IU singing right before their eyes.

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