Lee Eun Sang is a South Korean singer and songwriter, known for his participation in the reality survival show Produce X 101. Born on October 26, 2003, he gained popularity for his vocal abilities and charming personality. After the show, he debuted as a member of the project group X1, which was active from 2019 to 2020. Following the disbandment of X1, Lee Eun Sang pursued a solo career, releasing his first mini-album, Fever, in 2020. He has since continued to build his reputation in the K-pop industry, showcasing his talents through various music releases and performances.