Charlotte Emma Aitchison (born 2 August 1992), known professionally as Charli XCX (also stylised as Charli xcx), is an English singer and songwriter. Born in Cambridge and raised in Start Hill, Essex, she began posting songs on Myspace in 2008, which led to her discovery by a promoter who invited her to perform at warehouse raves. In 2010, she signed a recording contract with Asylum Records, releasing a series of singles and mixtapes throughout 2011 and 2012.

In 2012, Charli XCX rose to prominence collaborating with Swedish duo Icona Pop on "I Love It", which became an international success. Her debut studio album, True Romance (2013), was released to positive reception but failed to meet commercial expectations. In 2014, she contributed the hook and bridge to "Fancy" by Australian rapper Iggy Azalea, which finished the year as one of the best-selling singles worldwide and was nominated for two Grammy Awards. The same year, Charli XCX released "Boom Clap", which became her first solo top-ten single on the Billboard Hot 100. Her second studio album, the punk-influenced Sucker (2014), was released at the end of the year and spawned the successful singles "Break the Rules" and "Doing It".

Charli XCX began working alongside producers associated with the UK collective PC Music in 2015, developing a more experimental sound and image. She released the EP Vroom Vroom (2016), the mixtapes Number 1 Angel and Pop 2 (both 2017), and the studio albums Charli (2019) and How I'm Feeling Now (2020) to widespread acclaim. Her fifth studio album, Crash (2022), became her first to reach number one on the UK Albums Chart. She released the UK top-ten single "Speed Drive" as part of the soundtrack of the 2023 film Barbie. In 2024, Charli XCX released her sixth studio album, Brat, to critical acclaim and wide media coverage. It peaked atop the UK Albums Chart and produced the commercially successful singles "360" and "Apple", as well as "Guess" featuring Billie Eilish, which became her first number-one hit as a lead artist on the UK Singles Chart. The album and its songs earned her seven Grammy Award nominations at the 67th annual ceremony, including Album of the Year.

In addition to her solo work, Charli XCX has co-written songs for other artists, including Iggy Azalea's "Beg for It" (2014), Selena Gomez's "Same Old Love" (2015), Blondie's "Tonight" (2017), the Shawn Mendes and Camila Cabello collaboration "Señorita" (2019), and the Sigala and Rita Ora collaboration "You for Me" (2021). She was awarded the ASCAP Global Impact Award in 2024 in recognition of her contributions to pop music, as well as being on 2024 Gold House's most impactful Asian A100 list, making her the first South Asian woman of British Indian origin to be honoured.