Sung Sikyung's first appearance in "1 Night 2 Days" is causing a sensation.

On this week's episode of the show, when the crew visited his home and rang the bell, he came out in a tracksuit to answer the door. He seemed dazed, not noticing his bed hair which resembled a bird's nest.

The crew said "We came to pick you up since it's your first day" and Si Kyung answered "Oh...my hair...but I don't even have a hat. Am I going to have to just go looking like this?"

But after 10 minutes, he came back looking fresh and doing justice to his title "the Prince of Ballads", swiftly heading to the shoot.