Idol group 2PM's Junho showed his six-pack.

Junho wrote on his twitter, "Uploading this photo while we are idle. Showed a bit during the concert...Good night everyone," along with a photo.

In the photo, Junho shows off his great body in a fitness club without wearing a top. His six-pack that looked like a washboard has attracted many people's attention.

2AM's Seulong responded to Junho's picture with, "If I give you laundry, would you wash it with your abs?" Junho wrote back with, "What are you talking about?" in which Seulong wrote again, "Have you never heard that your abs look like a washboard? Oh my God. I cannot believe this. Seriously."

Internet users commented, "I didn't know Junho had such a well-shaped body", "Why don't you actually try to wash laundry", "It must require a lot of effort" and "Looks like a sculpture."

Photo: Junho's Twitter