10. Amy Thomson, ATM Management, founder
The tail that wagged the dog on Swedish House Mafia's stunning ascension was their manager Amy Thomson. Aside from a six-month interruption when the trio of DJs – Steve Angello, Sebastian Ingrosso, and Axwell – tried new representation, Thomson steered the group's ship into unprecedented terrain: They sold out Madison Square Garden without even a gold album. She understood that the Swedes were primarily a live phenomenon – and post-breakup, a legacy act, as commemorated on the documentary Leave the World Behind. Driven by her leadership, ATM also has been essential to breaking Afrojack and Alesso in Las Vegas, while Thomson now wields power in yet another way – as Musical Director for Light, the Cirque du Soleil-designed nightclub inside Vegas' Mandalay Bay.