Just when you thought it was safe to roam the streets of Los Angeles; Monster Massive takes claim of Hallow's Eve for North America's largest Halloween Dance Music Festival, transforming the Los Angeles Sports Arena and the Grounds of Exposition Park into a realm so wicked and perversely torturous for thousands upon thousands of travelers and dwellers of the night. An all-out assault of madness and mayhem by some of the world's biggest talents setting the soundtrack to a ghoulish night unlike any other; the main Tomb of Doom arena is headlined by the #1 DJ in the world, Armin Van Buuren. Without mercy in sounds Sasha, Hernan Cattaneo and John O'Callaghan will sadistically keep the costumed masses dancing without rest till the break of dawn.