THR's Power Business Managers 2012

Richard Feldstein has one of the more impressive rosters of music clients: Madonna, Dr. Dre, Lenny Kravitz, Maroon 5 and guitarists Slash and Izzy Stradlin, both formerly with Guns N’ Roses, are just a few.

Dad to Jonah Hill (see the resemblance?), Feldstein spends about four months a year at his firm’s New York office and the rest at the L.A. headquarters.

“I don’t know how you can handle some of these clients without having a presence” in both places, he says. “You have to be on the ground to know the [local] real estate laws.” Aside from work, his compulsion is to “fight to keep my waistline down.” He recently had his first session with a personal trainer.