Last night, Saturday, August 6, Slash joined rap group Cypress Hill on stage at the Troubador in Hollywood, California for a celebration of the band's 20th anniversary. You can check out fan-filmed footage of the event below.
After the show, Slash posted on his Twitter account: "Great getting up with Cypress Hill tonight. Good people, the whole organization. Survived 20 yrs together in this crazy biz."
Cypress Hill released their debut, self-titled album in August of 1991.
Slash also recently revealed via his Twitter account that he was beginning the second round of pre-production for what will become his second solo album.
Speaking of Slash and anniversaries, there's still time to get your vote in for your favorite track from Guns N' Roses classic double album, Use Your Illusion. Go here to vote!