WATCH: Dave Grohl joins Tenacious D for a cover of 'Summer Breeze'

WATCH: Dave Grohl joins Tenacious D for a cover of 'Summer Breeze'

This would've been sooo good to see live.

Dave Grohl joined his old mates Tenacious D onstage on Tuesday night, to perform a cover of Seals & Crofts 1972 song 'Summer Breeze.'

The performance, which was a benefit concert to raise funds for Victims First, also featured Beck, Foo Fighters producer Greg Kurstin and actor John C. Reilly. 

Towards the end of the performance, Grohl popped onto the stage and did a vocal rendition of a guitar riff, surprising the crowd who let out a massive cheer. Check out footage of the surprise performance below. 

Grohl would then go off-stage and return every time the chorus came along. He also ended the performance by leading the crowd to join him in a clap-along. 

The event was held at the nightclub Largo at the Coronet, which only holds around 280 people, so it would've been bloody great to be in there. 

It's one of Grohl's first public appearances since his bandmate, good friend, and the legend that is Taylor Hawkins passed. He also appeared on stage with Paul McCartney at Glastonbury this year, with the letter 'T' sharpied on his hand as a tribute to the iconic drummer. 

Two tribute concerts for the late stickman are set to take place in September this year, one being in London and the other taking place in Los Angeles. 

The lineup is a who’s who of rock and roll’s future, past, and present. Liam Gallagher, Brian May, Led Zeppelin’s John Paul Jones, 12-year-old drummer Nandi Bushell, and Josh Homme will all be making an appearance at the London show, which will take place at the iconic Wembley Stadium. 

Recently it was announced that joining those acts will be Lars Ulrich from Metallica, AC/DC’s Brian Johnson, Travis Barker, and Dave Grohl’s daughter Violet. 

The LA show at the Kia Forum will see the likes of Geezer Butler, Alanis Morissette, Miley Cyrus, and some of the Red Hot Chilli Peppers and Queen taking the stage.