Billie Eilish Sings in Spanish With Rosalia on New Collab 'Lo Vas a Olvidar’

On Thursday, Billie Eilish and Rosalia dropped their new song together, ‘Lo Vas a Olvidar.’ The singers first teased the collab back in March 2019 and later that year, the Spanish singer opened up to ET about working with Billie at the 2019 Latin GRAMMYs.