It turns out that legendary guitarist Slash is a fan of BabyMetal.
BabyMetal were already massive in their native Japan, but 2014 is when Su-metal, Yuimetal and Moametal took over the world.
The two bands collided to create the new song 'Road of Resistance,' which BabyMetal have been jamming live while touring the world.
The new group seems to be taking creative liberties from BabyMetal's unique act, causing a major stir in the process.
Three of metal's most celebrated musicians just gave BabyMetal their stamp of approval.
Babymetal is an eclectic and highly addictive act that merges metal instrumentation with classic J-pop elements.