Well, the "world" being three European countries and Japan. But at any rate, exciting news for anyone who's developed a soft spot for one of Japan's latest (only?) J-pop/heavy metal mash-up bands. According to Japanese website Netallica (which I guess I really should be leery of after they published "news" reported by the Onion), BABYMETAL will embark upon a world tour this summer, playing in France, Germany, England, and Japan. And hey, apparently they'll be appearing in London with Iron Maiden.
Update: No one knows what to think.