On April 15 episode of Mnet's television show 'Kingdom: Legendary War', WOOYOUNG was seen talking to his labelmate another boy group Stray Kids.
![WOOYOUNG](https://img.sbs.co.kr/newimg/news/20210416/201541188_700.jpg)
BANG CHAN said, "'Side Effects' performance has somewhat similar vibes to 2PM's 'Heartbeat'. What kind of mindset did you have for your 'Heartbeat' performance in the past?"
WOOYOUNG thought for a bit, then answered, "First of all, you must zone out rather than focus in order to give that sort of look to your face."
He jokingly continued, "But you must note that I was poor and hungry during 'Heartbeat' days, so that was a huge help."
With a playful smile, he added, "Well, there are many more things that I want to say, but I'll just end it here."
![WOOYOUNG](https://img.sbs.co.kr/newimg/news/20210416/201541187_700.jpg)
Then, WOOYOUNG turned serious and said, "I've seen your performance, and I've never seen anything like it. You guys were so amazing."
He resumed, "Just practice as hard as you can, and enjoy the performance thinking that it doesn't matter even if I make a mistake."
![WOOYOUNG](https://img.sbs.co.kr/newimg/news/20210416/201541189_700.jpg)
(SBS Star)