[12] Lee and Rise, another groupmate, suffered serious injuries and were taken to the Catholic University of Korea St. Vincent's Hospital in Suwon.

[13] Lee's situation was stabilized, but Rise's condition deteriorated and she was transferred to Ajou University Hospital, where she died four days later on September 7, 2014.

[16] After Ladies' Code's return after the accident, Lee was featured in two episodes of the King of Mask Singer talent show on February 21.

[20] In February 2020, Lee and Ladies' Code bandmates Zuny and Ashley left Polaris Entertainment after contract expiration and unsuccessful renegotiations with the company.

[22] The following year, she participated in JTBC's second-chance vocal competition show, Sing Again, finishing among the program's top six contestants.

[23] On February 19, 2021, under new label Needs Music Entertainment (니즈뮤직엔터테인먼트), Lee released her third single album, 함께 했는데 이별은 나 혼자인 거야, consisting of a title ballad of the same name and its instrumental version.

[24] The track became the first of Lee's singles to enter Korea's weekly Gaon Digital Chart, peaking at number 92.