[3][4] In 2015, Lee participated in Mnet's reality survival show Sixteen, which eventually determined the members of girl group Twice.

[citation needed] On June 15, 2018, Lee represented WM Entertainment on the girl group survival reality show Produce 48.

The group debuted on October 29, with the release of the EP, Color*Iz, and lead single "La Vie en Rose".

[9] On July 11, WM Entertainment stated that Lee would be participating in the reality TV show Street Woman Fighter as one of the dance crew members.

[10] In September, it was announced Lee and former Iz*One members Jo Yu-ri and Kang Hye-won would be hosts in a new web show titled Adola Travel Agency: Cheat-ing Trip.