Kang Seo Jin is a current contestant on Kpop Star but the judges were curious as to why she looked so familiar. Turns out - she looks a lot like Sulli of f(x)! After this point was brought up, Seo Jin explained that she was also a member of SM entertainment once! Kang Seo Jin remarked, “I went in as a trainee not knowing anything and eventually left. [After I left], I contemplated a lot about what it is that I really want to do.” To be honest, I'm not a huge fan of her voice but I'm interested to see how she continues to do in the competition!