Sia Releases Haunting 'California Dreamin'' Cover for 'San Andreas' Movie

Kevin Winter/Getty Images For 102.7 KIIS FM's Wango Tango
Sia performs onstage during 102.7 KIIS FM's 2015 Wango Tango at StubHub Center on May 9, 2015 in Los Angeles, California.  

Sia has surprised us again!

The mysterious singer released a haunting, beautiful cover of The Mamas & the Papas' "California Dreamin" for the San Andreas movie (starring Dwayne "The Rock" Johnson), and you can listen to it in full below. Sia's powerhouse vocals are on full display, turning the bittersweet song into a gorgeous slow-burner that demands repeat listening.

Sia is no stranger to soundtracks; she oversaw and contributed to the Annie remake soundtrack, and co-wrote the big original song from this week's Pitch Perfect 2