On January 13, Yoona updated her YouTube channel with a new video.
The video showed Yoona meeting JUNHO at a dance studio to practice 'Señorita' together.
Yoona and JUNHO performed 'Señorita' at MBC's annual end-of-year music festival 'Gayo Daejejeon'.

JUNHO said, "We used to see each other a lot for work when we were young, but it's been a while. It's been like almost 10 years, I think."
Yoona responded, "Yeah, it's really been some time. Hey, how about you dance to Girls' Generation's song and I dance to 2PM's song? It'll be fun, don't you think?"
JUNHO answered, "Oh, our fans would love that. Let's try it!"

As Yoona did not know the exact choreography, she asked JUNHO to teach her some moves.
Not long after, Yoona managed to learn the choreography, and they had a mini 'My House' performance together.

But JUNHO was reluctant to raise his arms up high, as he was too shy about exposing his armpit.
So, Yoona decided to teach him the choreography for 'Lion Heart'.
JUNHO also learned it quickly, then they performed 'Lion Heart' together.

Then, they high-fived one another and went back to practicing 'Señorita'.
(Credit= 'Yoona's So Wonderful Day | 임윤아 오피셜' YouTube)
(SBS Star)