2019–present: Debut with Itzy On February 12, 2019, Lia officially debuted as a member of
Itzy with the release of their first single album, ''
It'z Different'', and the music video for its lead single "
Dalla Dalla". In 2022, she released her solo song "Always Be Your Star" for
MBC's
The Red Sleeve. Later that year, she recorded "Blue Flower" for
tvN's
Alchemy of Souls 2, which peaked at number 184 on the
Circle Chart. On May 26, 2023, Lia released "One Hundred Love" for the original soundtrack of
Dr. Romantic. On September 18, 2023, JYP Entertainment announced that Lia would be taking a hiatus to focus on treatment for anxiety. During her break, she released "Blossom", a solo track dedicated to her fans, which she co-wrote with Sim Eun-ji as part of Itzy's solo performances on the EP
Born to Be. On July 9, 2024, JYP Entertainment announced that Lia would resume activities with Itzy, starting with a new album set for release in the second half of the year. In the same year, she recorded "Why Not" for
SBS's
The Fiery Priest 2, and "Woodahe" for
JTBC's
The Tale of Lady Ok. ==Other ventures==