At long last, that Rosalía and Billie Eilish collaboration is here. The Spanish singer teamed up with the pop superstar for “Lo Vas A Olvidar,” which will be a part of the soundtrack to HBO series Euphoria.

The hotly-anticipated collaboration was nearly two years in the making. Eilish first confirmed that she was working with Rosalía back in Feb. 2019 in an interview with the BBC. Rosalía was open in follow-up interviews about how their song was unfinished because both artists couldn’t find the time to get together again. “Can’t wait to finish our song,” she wrote on Twitter in March 2019.

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While in quarantine during the COVID-19 pandemic, Rosalía told Apple Music’s Zane Lowe in April 2020 that she found the time to finish working on the song. She was only waiting for Eilish’s vocals to come in to wrap things up.

Following a recent wave of Anglo artists teaming up with Latin music’s superstars, Eilish released “Lo Vas A Olvidar” with Rosalía. On the atmospheric track, Eilish sings in Spanish about walking away from a toxic relationship. Both Grammy-winning singers beautifully harmonize with the heartbreaking lyrics. In the song’s few English lines, they repeat on the chorus, “Can you let it go?” This Eilish and Rosalía crossover is a subtle yet stunning moment.

“Lo Vas A Olvidar” is not actually the first time that Eilish has sung in Spanish. She’s a Carla Morrison fan and she’s covered the Mexican singer’s “Eres Tú” in the past. Eilish’s Spanish pronunciation remains on-point.

The second season of Euphoria starring Zendaya will premiere on HBO on Jan. 24. “Lo Vas A Olvidar” will be featured in the episode “Part 2: Jules.” Rosalía and Eilish’s next albums are due out later this year.

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