Photo: Robert Trachtenberg

She's worked with Jay-Z, Missy Elliott, and Kid Rock, and just might be the music industry's most powerful female player (Sean "Diddy" Combs has called her "the coolest white Jewish girl in history").

Adam Says: "These days every brand is doing statement jewelry. No matter how much (or how little) you spend, it looks great piled on."

"There's no need to shell out for a high-fashion shoe you'll wear to death for just one season. These are only $55."

Julie Says: "Monday to Thursday, my outfits need to transition." This sexy gray dress is the kind of piece that can take her from the boardroom to the "dirty little rock clubs" where she checks out bands. "For day I'd wear it with a jacket or funky jewelry, and some really sick shoes," she says. "Later I'd add more eyeliner and I'd be ready to go!"

Biggest Deal
"Signing Death Cab for Cutie. They were a cool indie band, and for them to sign with a major label showed fans and critics we're interested in helping artists sell more music. It was important not to mess it up."

Dress, Obakki; $334. Earrings, Rachel Rachel Roy. Bracelets, Simply Vera Vera Wang, Ann Taylor, and Loft. Ring, V by Eva. Shoes, Aldo.

Next: Your new go-to jacket, plus a dress you can wear to work and then out at night