MUSYCA Children's Choir is featured in "California Dreaming," a new song by the rap rock band Hollywood Undead. MUSYCA kids sing the chorus of the song as well as the echos "in California we're dreaming". The magical singers recorded the vocals at Clear Lake Recording studios in Burbank, with HU's Jorel Decker (aka J-Dog) and producer Sean Gould (Katy Perry, Moby).