Fiestar began their career prior to debut by releasing a duet with label mate IU titled "Sea of Moonlight" in July 2012 for LOEN Entertainment's collective label album and later gained domestic success after entering the top ten of the Gaon Digital Chart.

[3] Fiestar officially released their first independent single, "You're Pitiful", a remake versions from their first EP Black Label (2015).

[4] In July 2012, LOEN Entertainment announced it would be debuting a six-member girl group named Fiestar in August.

[5] The oldest member, Cao Lu, had previously debuted as a soloist in China after winning a 2004 CCTV singing contest.

[6] The group's leader, Jei, had modeled for online clothing stores[citation needed] and appeared in the music video for Infinite's 2011 single "Paradise".

[8] Cheska, who is Korean American, auditioned for JYP Entertainment in 2008, but did not join the company due to opposition from her parents.

[6] Yezi started her career as a backup dancer for singers Park Mi-kyung [ko] and Hong Kyung-min.

[11] Fiestar's second single "We Don't Stop" was released on November 9, with the B-side track "Sweet Love" featuring ballad singer Kim Yeon-woo.

In September, LOEN Entertainment created the sub-label Collabodadi, under which Fiestar would continue to release their music.

[17] On November 1, the group released the single "I Don't Know" on the EP Curious, making their stage comeback on Music Core the following day.

On March 20, 2014, LOEN Entertainment announced that Cheska would be leaving the group and would not be replaced by any new members, and Fiestar's comeback was scheduled for mid-July after being postponed due to the Sewol ferry tragedy.

On June 16, a single in collaboration between The Friends and Fiestar for the 2014 Brazil World Cup titled "I Love Korea" was released.

On December 17, Cao Lu appeared on Radio Star as a guest along with rapper Jessi, Got7's Jackson, and Lena Park as part of the Outsiders special.

[33] Their remake single "You're Pitiful" was officially released on August 31, with a new style which combined "UK Garage" and "Rage Pop" genres.