Scott Shriner and the rest of Weezer are living embodiments of the axiom “the show must go on” … ’cause they performed at Coachella mere days after Shriner’s wife was arrested.

The beloved rock band hopped up to perform at the popular music festival in Indio Saturday … and, they played some of the hits — belting out songs like “My Name is Jonas” and “Hash Pipe.”

Watch the clip … Shriner looks focused on the music — shredding alongside Rivers Cuomo onstage, a significant achievement given the difficult position his wife is in.

We broke the story … Shriner’s wife Jillian Lauren was shot by cops and then arrested for attempted murder Tuesday. Officers allege she came out of her house with a gun while they were searching for three suspects who had fled on foot after a hit-and-run.

Cops claim she fired the weapon … with Los Angeles Police Dept. Spokesperson Jennifer Forkish telling us TMZ “Our investigation revealed evidence such as a shell casing and video footage showing she repeatedly ignored police commands to disarm and that she fired her weapon at LAPD officers. She was subsequently booked for attempted murder of a peace officer.”

Officers say they also told Lauren to drop the gun … and, they say they shot her in the shoulder when she wouldn’t. Lauren was taken to a hospital and treated for a non-life-threatening gunshot wound, then booked on the attempted murder charge.

Shriner couldn’t comment on the police shooting … but, did tell us Jillian is doing alright when we caught up with him Thursday.