I think we really underestimate the entrepreneurship required to be an indie rapper and break-through. Marc Benioff freely admits he stole marketing ideas from MC Hammer and his street teams when launching Salesforce.

E-40 is a marketing super genius. He's been rapping and producing since 1990. And has had so many brand extensions since the mid-90s from energy drinks to wine to tequila.

You never know where you will find inspiration!