Former UCLA student and KARA's Kang Jiyoung's cousin, NS Yoon Ji finally makes her comeback with her latest track Don't Go Back on Music Bank! Although this is her first live performance since her music video was released several days ago, she is already facing plagiarism accusations for the song. However, nothing has been confirmed or denied so until we get more word, check out her bubbly, infectious performance below! And make sure you mark your calendars for when her first single album Ambitious officially releases on May 18th! http://www.youtube.com/watch?v=mbXFOlfY4kE