Them Crooked Vultures may have been among the finest musicians to ever come together, but it only takes one riff to get everyone on the same page.

Nirvana reunited on stage with Post Malone for a performance at SNL50: The Homecoming Concert on Valentine's Day - marking Dave Grohl's second time on stage since his cheating scandal.

They were introduced by Adam Sandler, and they went on to play “Smells Like Teen Spirit.” Watch footage of that below.

There have been nearly 1,000 musical performances on "Saturday Night Live" in its 50 years. We pick 10 of the best.

With that out of the way: ladies and gentlemen… it’s the best musical performance from all 50 seasons of SNL.

FireAid was a marathon, landmark event, with at least 39 artists performing 68 songs over six hours, weaving together a sonic tapestry of past and present, heartbreak and hope for Los Angeles.

It felt like, Now I’ve done everything I wanted to do on this show. I emailed Lorne Michaels the next day to say, ‘Thank you.

Foo Fighters frontman Dave Grohl has been added to the line-up of the star-studded SNL50: The Homecoming Concert spectacular ...

Dave Grohl has joined the list of performers who will celebrate ... Shortly after, Foo Fighters dropped off the lineup for Soundside Music Festival in Bridgeport, Connecticut, canceling their set only ...

Hours after she joined Green Day to kick off FireAid, Billie Eilish returned with brother ... but that’s what fans received ...

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For rock fans, the biggest surprise of the night was the unexpected reunion of Nirvana members Dave Grohl, Pat Smear and Krist Novoselic, with guest vocalists stepping in for the late Kurt Cobain.