Singer Yoo Seung Woo from "Super Star K4" copied IU by waving his hand from the passenger's seat.

Today, one online community forum posted pictures of Yoo Seung Woo after Mnet "M! Countdown" under the title "Yoo Seung Woo, Halfmoon Eye Smile On the Way Home." Yoo Seung Woo had rolled down his window to wave bye to his fans that had come to cheer for him. He revealed his trademark halfmoon-eye smile, melting away the hearts of his fans. IU had done the same on several occasions after her schedules, officially making Yoo Seung Woo the boy version of 'national younger sibling.'

Internet users who saw this comented, "So cute" and "I love his smile."

Yoo Seung Woo held his debut stage yesterday on Mnet "M! Countdown" with his first mini album title song "Hello."

Photo Credit: Online Community