It comes after the singer teased her sophomore album last month
She previously said her sophomore album would be "super weird"
Roan has recently been vocal about mental health and the pressures that come with fame
She previously hit back at a photographer for seemingly telling her to "shut the fuck up" at the VMA awards
"Me and a friend of mine went and looked at her schedule, and it was outrageous"
"Headlining Primavera Sound next year with Sabrina and Chappell. Finally, holy trinity unlocked," wrote Charli
Charli XCX, Chappell Roan, Sabrina Carpenter, LCD Soundsystem, FKA Twigs, HAIM, Fontaines D.C., Beach House, IDLES and more are all on the stacked line-up for the 2025 edition of the Barcelona festival
Producer Dan Nigro teased it was "a new version of Chappell"
"The general public will never learn, now they've moved on to Chappell, fuck them"
The jam session took place backstage and included Lucy Dacus, Brandi Carlile and more