The successful applicants will appear in a "rain and mud fight" scene at a concert
The band are also backing the film, which is based on their early days
"It was an honour"
"The Grammy's are a joke!"
The event was held in support of the victims of the devastating wildfires
The respective line-ups for the KIA Forum and Intuit Dome events have also been revealed, while ticketing fees have been waived
Musk previously mocked the band for hitting out at Donald Trump
The FireAid concert will take place across two venues and will also include names like Joni Mitchell, Red Hot Chili Peppers, Sting, Gracie Abrams and more
The band covered classics by the likes of David Bowie, Nirvana and The Strokes at the intimate show
The club's resident musician Callum McMorran had no idea the singer was in attendance