Billie Eilish Shows Off Her Spanish in Dreamy Rosalia Collab 'Lo Vas A Olvidar': Watch

After hinting that a collaboration was in the works back in Spring 2019, Billie Eilish and Rosalia finally dropped their highly anticipated track “Lo Vas A Olvidar" on Thursday (Jan. 21), in which Eilish completely stuns by singing in Spanish.

With dreamlike, almost hazy melodies, the slow-tempo, bilingual song brings to the forefront Eilish and Rosalia's vocal chemistry and enchanting harmonies. "Dime si me echas de meno' aún" ("Tell me if you still miss me") Rosalia kicks off. "Dime si no me perdonas aún" ("Tell me if you still don't forgive me"), continues Eilish.

The two artists go back and forth on the melancholic lyrics before Eilish closes off with a thought-provoking verse in English: "If I wasn't important, then why would you waste all your poison?"

The official music video, filmed by award-winning director Nabil, shows the two artists' powerful performances in a somber setting.

“Lo Vas a Olvidar” was teased earlier this week on the official trailer for HBO’s Euphoria. The song will form part of a forthcoming “Part 2: Jules” special episode premiering on Jan. 24.

Watch the music video below.