Dave Grohl's daughter Violet sang with his fellow Nirvana band members on Thursday, Jan. 30 at the FireAid Benefit Concert for California Fire Relief

FireAid had some surprises in store, but none bigger than the first reunion from Nirvana's surviving members in over a decade.

The FireAid benefit was fueled by some of music’s best performers to raise money for Los Angeles-area wildfire relief efforts.

The surviving members of Nirvana reunited at FireAid with guest vocalists St. Vincent, Kim Gordon, Joan Jett and Violet Grohl.

St. Vincent, Joan Jett and Kim Gordon joined Pat Smear and original Nirvana members Dave Grohl and Krist Novoselic onstage for a reunion of sorts at FireAid Thursday. Violet, Jett, and Gordon each subbed in for the late Kurt Cobain.