The USC grad represents clients in all areas of entertainment, including Mel Gibson, which became public during a custody battle with his ex-girlfriend. In addition to estate planning, Mulrooney also consults on prenuptial agreements and divorces. "I'm one of the few people whom they can really trust," she says. Mulrooney chairs her firm's West Coast trust and estates practice and is already creating her own professional succession plan. "I want to do this for quite a bit longer," says Mulrooney. "But when I don't want to do it anymore, my clients are going to have great representation."