Unlike Baek Ayeon who works under a cute concept, the country style Roy Kim, glamorous and sexy Kim Ye-rim, and sad ballad-singing Son Seung Yeon all sing songs that feel much more mature than their ages.

It is true that Roy Kim, Son Seung Yeon and Kim Ye-rim mastered their concepts and themes so well that, in contrast to the lovely Baek Ayeon, they came across as more mature.

It's interesting that Roy Kim in particular is the same age as SHINee's Taimin, who is giving off a fresh charm on MBC'S 'We Got Married' with A Pink's Son Na Eun. But even they display their younger sides when they set their mics down; after all, they're in their early 20's. Roy Kim recently generated laughter when he hastily answered MC Jun Hyun Moo's naughty question at a showcase for his album release.

Regarding skin treatment, he revealed that "I received laser treatment but that really did not feel good. So I'm just washing well." He also admitted, "I'm devouring girl group music videos these days. Dal Shabet's MV was very impressive."

Son Seung Yeon also turns into a cute young woman when trading remarks offstage. Her nasal charm is her unique trademark. In a recent interview with OSEN, she said, "I think it's a good thing that I can show many sides of myself because of the contrast onstage and offstage."

Meanwhile Baek Ayeon gives us a performance as equally charming as her appearance. Her smiling eyes, dancing shoulders and light choreography are taking the spotlight amongst male fans.

On the other hand, Kim Ye-rim shines with a sexy dance and mysterious charm belying her 21 years. Her appeal that makes us want to know more and her distinct tone have firmly set her apart from the crowd.