I have found some photos showing idols who were borned in 1991 playing around during MBC Gayo Daejoon.

KARA's Nicole is really freindly,it seems like she can fool around with anyone she meets without concerning gender and age.

In the first photo,she is dancing with SHINee's Key,look at her smile,she must be enjoying the moment very much.Then the 2nd photo showing her hugging Seo Hyun,those who are not k pop fans might think that they are from the same group!

Many thanks to kpoprants for the photos!