Itzy is recognized for their "teen crush" concept and explore themes of independence and self-love in their music.

Itzy debuted on February 12, 2019, with the single album It'z Different and its commercially successful lead single "Dalla Dalla", which peaked at number two on the Circle Digital Chart, the Billboard K-pop Hot 100, and the US World Digital Songs chart.

In 2021, the group released their debut studio album Crazy in Love, which peaked at number 11 on the Billboard 200.

Itzy's fifth EP, Checkmate (2022), was their first to surpass one million copies sold and their first top-ten entry on the Billboard 200 at number 8.

The group achieved two further million-seller albums with their sixth and seventh EPs, Cheshire (2022) and Kill My Doubt (2023).

[3] In 2015, Chaeryeong participated in JYP's survival show Sixteen but did not make the final lineup of the winning girl group, Twice.

The final member, Lia, initially auditioned for SM Entertainment and passed, but was forced to back out at the last minute due to a disagreement with her parents.

The tour opened in Jakarta on November 2 and visited different cities in Asia throughout the end of 2019 and the US for five shows in January 2020.

[31] Featuring production from Sophie and Oliver Heldens, the EP saw the group experiment with EDM sounds while continuing to explore lyrical themes of freedom, self-confidence, and individuality.

[34] On August 17, 2020, Itzy released Not Shy, their third EP, as well as the music video for the lead single of the same name.

[39] On March 20, 2021, Itzy released the digital single "Trust Me (Midzy)", a song dedicated to their fans, as part of their first global livestream event.

[46] On September 24, Itzy released their first studio album Crazy in Love and its lead single "Loco".

[50] On February 10, 2022, it was reported by Billboard that Republic Records and JYP Entertainment added Itzy to their strategic partnership, which initially only included Twice.

[56] On July 31, 2023, Itzy released their seventh EP Kill My Doubt, led by the single "Cake".

[57][59] The quintet held a showcase at the SK Olympic Handball Gymnasium in support of the EP on the day of its release.

[62] On September 18, JYP Entertainment announced that Lia would be taking a hiatus due to experiencing extreme tension and anxiety.

Lia also posted a handwritten letter to fans: "I came to realize that I've been gradually losing myself while running up to this point".

The EP features the first solo tracks for each member of the group, including Lia, who was on hiatus during the album release.

[66] On July 9, JYP Entertainment announced that Lia would be resuming activities with the group: "following treatment and rest, her tension and symptoms of anxiety have significantly improved".

[67] On October 15, they released their ninth EP, Gold, and the music video for its lead single of the same name.

[71] Later that year, Itzy inked endorsement deals with clothing brand Andar[72] and MAC Cosmetics.