Back in 2019, Rosalía tweeted a polaroid of her and Billie Eilish together in the studio, teasing a possible collaboration. Jan. 21, 2021 fans received a long-anticipated answer. Eilish and Rosalía released “Lo Vas a Olvidar,” a hypnotizing, bilingual single co-written by Eilish’s brother Finneas.  The mixture of swelling music and beautiful harmonies between Eilish […]