The nation's little sister IU tossed aside her adorable charms and displayed her swag with a pair of sunglasses and a red leather jacket.

On the May 25th episode of KBS 'Yoo Hee Yeol's Sketchbook', IU put on a powerful dance performance of Rain's "Rainism".

The singer confidently pulled off each trademark move without appearing awkward, but looked extremely embarrassed when sitting with MC Yoo Hee Yeol after her stage performance.

"The dance was awesome, much better than Rain (pause)... the backdancers, I mean," the MC joked, causing IU's face to further grow red to match her jacket.

"IU was amazing too. Your braided hair made me feel as though I was watching a scene out of a historical drama," he continued to joke, trying to make IU feel less nervous.

"I'm so bewildered right now. [The nerves] made me physically sick," IU said, giving a bashful smile.

IU also delivered a performance of her self-composed song, "Peach", earning the praise of the audience members.

Check out her performances below!
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Source & Image: MKSports via Nate
Tip: Maddy