Dave Grohl on the time he wrote a “super duper heavy” riff for Ozzy Osbourne, but it ended up being a Probot song February 27, 2026 by Staff Writer “It’s a killer riff, man”., as reported by NME. Billboard confirmed that “I’m totally uninvolved … she’s just totally doing her own thing,” the rocker said. Last updated February 27, 2026.