Shinhwa's Dongwan gave a slight peak at his muscular figure in his group's latest comeback teaser, but he recently�revealed his motivation to buff up wasn't necessarily for his comeback but to prove his ex-girlfriend wrong.

During filming for�KBS 2TV's 'Happy Together 3', Dongwan revealed, "The reason I built my body was because of my ex-girlfriend. After breaking up with my girlfriend who didn't like my skinny figure at the time, I suddenly began to workout."

Hyesung, who is known to be the most shy about showing his body, shared, "When I first lived in a dorm together with my members, I couldn't understand their pranks, so I used to lock the door and shower." Hyesung also recalled a hilarious story of how he was scolded by Lee Soo Man after showing an extreme dance to get more parts in the group's songs.

Tune in for the Shinhwa special on the 16th KST!