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During the 11th episode, the hosts and house guests were met with non-stopping rain. While trying to find something interesting to do, YoonA got her hands on a karaoke MIC in which proceeded to start singing outside in front of the rain.�

She sang a wide range of songs and did not stop whatsoever�while giggling to herself like a little kid. Seeing this, Lee Hyori and Lee Sang Soon couple peeked around the corner and even asked, "Is she okay? I'm getting worried. She must've had a lot on her mind. She's gone weird," laughing at the hilarious moment.

Check out YoonA's solo concert(?)!