Kara debuted on March 29th 2007 with "Break It" on M! Countdown as a 4 member. Nicole was one of the four along with Gyuri, Seungyeon, and Sunghee. Kara was often compared to Fin.K.L because of their concept and the fact that they are both from the same company(DSP Entertainment). Later on Sunghee left the group in March 2008 due to parental pressure, just when Kara intended their comeback. Sunghee failed her college exams and left the group. On July 24th of 2008, Kara came back with two new members, Goo Hara and Jiyoung. Their new concept was "cute" and "playful".