360

Released on 10 May 2024 on Atlantic, "360" opens Brat. A. G. Cook and Cirkut produced it, and Cook said it was made quickly because Charli had a clear vision for it. It has a minimalist, synth-led backing, with Charli singing in a deadpan tone, and it interpolates Ciara's "1, 2 Step". The opening line is "I went my own way and I made it / I'm your favorite reference, baby". Other lines name Cook, the model Gabbriette and the actress Julia Fox. Charli told Fox in a 2023 interview that "I'm so Julia" was about how Fox started every trend of 2022.

The video, directed by Aidan Zamiri and filmed on 11 and 12 March 2024, begins with a skit in which Fox, Gabbriette, Rachel Sennott and others meet at a dinner to choose a new hot Internet girl, and Chloë Sevigny. It won Video of the Year at the UK Music Video Awards and was nominated for the Grammy for Best Music Video. The song peaked at number 11 in the UK and Ireland and at number 41 on the Billboard Hot 100, and was nominated for Record of the Year. Pitchfork's Meaghan Garvey asked whether it was her best pure pop tune in ages.

Charli sang it as host and musical guest on Saturday Night Live on 16 November 2024, introduced by Fox, and in a surprise Times Square performance later that month. On 21 June 2025 she performed it with Dua Lipa on the second London night of Lipa's Radical Optimism Tour. A remix with Robyn and Yung Lean came out on 31 May 2024, and the closing Brat track "365" is a remix of "360" that Cook first made for a DJ set. Wet Leg played a version at Truck Festival in July 2024, and Blossoms covered it for BBC Radio 1's Live Lounge in October 2024.