Chappell Roan made a rare public appearance on Monday night when she joined Rosalía on stage at the Oakland Arena, part of Rosalía's global arena tour behind her acclaimed 2025 album Lux. The moment matters because Roan has largely stayed out of the spotlight lately, having not given a full performance since Lollapalooza Brazil, so any appearance draws considerable fan attention.

Roan took part in the tour's recurring "confessional" segment, which Rosalía stages before performing "La Perla" and has previously featured guests such as Karol G, Marcello Hernández and Lola Young. Following Young's example, Roan shared the story behind her song "Casual", recounting how she travelled to Los Angeles to write music with an unnamed person, felt a sudden romantic spark, and then learned they had met someone else soon after their first date. She also playfully tried to explain the word "faucet" to Rosalía, with fan videos of the exchange circulating online.