From surprise guests to touching moments of humility, here were the most memorable moments from the Jan. 30 FireAid benefit concerts in Los Angeles.

Violet Grohl joined her father, Dave Grohl, and his former Nirvana members for a performance of ‘All Apologies’ at the FireAid benefit concert

The surviving members of Nirvana reunited at FireAid, rocking through four of the grunge giant’s classic tracks. The unannounced performance marked Dave Grohl ’s return to the stage following public acknowledgement in September that he fathered a child out of wedlock.