With the UK's first rock and hip-hop festival, ALT+LDN, on the horizon this month, it got us thinking about all the other great crossover potential there is, given how much the two genres have collided in the past.
And, more than anywhere else, the live arena is where this combination has the potential to shine the brightest. At the end of the day, any concert is all about that energy the audience feels as a musician takes the stage and everyone loses their mind at once. On top of that, having rock bands and hip-hop stars touring together could result in some onstage collaborations that wouldn't come about otherwise.
Here, then, are 10 other hip-hop and rock collaboration tours away from ALT+LDN that we'd pay to see in a heartbeat…