There were teases of it in last week’s San Andreas trailer, but now we have the full thing: Sia taking on Mama Cass. The Australian singer’s cover of The Mamas & the Papas’ “California Dreamin’ ” surfaced Monday, just under three weeks until the Dwayne Johnson-starred disaster epic hits theaters. The first verse is slower—let’s stop doing this—and more haunting than the 60s classic. And then heavily layered production follows. Considering the original song focused more on the vocal overlays of the quartet than instrumentation, Sia definitely seized the perks of artistic licensing. Listen to it over at Fuse.