"Leave (Get Out)" was written by Soulshock, Kenneth Karlin, Alex Cantrell and Phillip "Whitey" White of the Trackheads.

The song was released in the United Kingdom and Ireland on August 30, 2004, as a CD single and digital download.

"[5] Johnny Loftus of AllMusic noted "Leave (Get Out)" as one of the album's top tracks, writing that it "doesn't have a lot of staying power, but its guitar figure is a nice touch, and the chorus hits with the right amount of tell-off brashness.

[8] The song made gradual movements up the chart, reaching the peak of number 12 on the issue dated July 31, 2004, 16 weeks after its debut.

[9] It lasted 12 more weeks on the Hot 100 and sold over 500,000 downloads, earning a gold certification by the Recording Industry Association of America (RIAA).

[9] Aside from the Hot 100, "Leave (Get Out)" managed to peak at the summit of the US Billboard Pop Songs for five consecutive weeks.

"Leave (Get Out)" became an international success, reaching top five peaks in several European and Oceanic territories.

In Australia, the song debuted at its peak position and lasted on the singles chart for 15 weeks, eventually shipping 75,000 units to the country and earning a platinum certification by the Australian Recording Industry Association (ARIA).

[9] The music video, directed by Erik White and choreographed by Laurie Ann Gibson, takes place in a high school in California.

She is also seen dancing with cheerleading girlfriends, including pictures hanging on the walls with her alleged ex-boyfriend.

In December 2018, JoJo released a re-recorded version of "Leave (Get Out)" featuring reworked vocals and production.

[17] On March 19, 2020, JoJo uploaded a video of her singing from home a new quarantine-themed version of the song, titled "Chill (Stay In)", which featured updated lyrics encouraging self-isolation and social distancing during the COVID-19 pandemic.