The worlds of rock and pop might be diametrically opposed in some ways but there have always been crossovers, in both directions of travel. From Eddie Van Halen lending his six-string skills to Michael Jackson’s Beat It to Ozzy Osbourne and Post Malone’s recent I’ll-scratch-your-back-you-scratch-mine collaborations on Take What You Want and It’s A Raid, there have been plenty of odd-couple pairings to raise eyebrows. Sometimes, though, unlikely alliances have flown largely under the radar. Here are 10 times major pop stars have appeared on rock and metal songs that you probably don’t know about.
