Nation's little sister IU revealed her ideal guy through ideal person world cup.

Recently, IU received attention of many guests including sub MC G4(Kim Jun Ho, Kim Won Hyo, Huh Kyung Hwan, Jung Bum Gyun), Jung Hyun Moo, Marco, and others in the makings of KBS 2TV 'Happy Together 3' Christmas party special.

On the spot, IU's ideal guy world cup was carried out with the male cast as the subjects. When Yoo Jae Suk made it to top 2, everyone seemed to assume his win. However, when an unexpected person pushed YJS aside to take the win, it took everyone by surprise. Everyone seemed to have been surprised at IU's choice but IU stated that her ideal guy's best feature is his 'eye smile', explainingthat she likes how he's always smiling.