The 2PM member has been making fans scream with his physique on music shows, and now HOTTEST can take a look at what he went through for his first performance of his latest track. Jun.K makes sure to do a few push-ups and check his audio before going on stage. 2PM member Wooyoung also shows up to cheer him on.
Jun.K even takes care of the fans who waited to see him, handing out treats and preparing a drink cart.
Check out Jun.K's behind-the-scenes look above, and remember to turn on the English captions!