ELIZABETH COLLINS, 51
SUSAN GENCO, 53
Co-presidents, The Azoff Company
$125 MILLION TO BUY BACK THEIR COMPANY: It's a new era for Irving Azoff's entertainment behemoth: In December, Collins and Genco completed their mentor's bid to "buy back" full control of his music management company -- which, after a 2013 merger, became Azoff MSG Entertainment -- through a $125 million purchase of Madison Square Garden's 50 percent stake. "We love MSG, we'll stay close to them, but now we're looking forward to the next five years and new opportunities," says Collins of the split. Genco's 2018 also included negotiating a last-minute compromise between SiriusXM and the three majors that cleared the way for the passage of the Music Modernization Act. Disruption remains a core value for the joint leaders, who oversee a portfolio that includes Global Music Rights, Oak View Group, Lane One and Full Stop Management.