The Gig: Chairman, Interscope Geffen A&M CEO, Beats Electronics; Co-Founder/Beats By Dre Founder, Aftermath Entertainment

Not one to rest on Iovine's past pop (Bruce Springsteen, John Lennon, and U2 records) and Dre and Iovine's hip-hop laurels (Eminem, Dr. Dre, and 50 Cent records), this duo's changed the way we consume music, now. Beats By Dre has become the headphone brand to cop.

Before Beats By Dre, headphones costing over $100 rarely sold well, but since its 2008 launch when it was promoted mainly to a youth-oriented market, kids have been running to cop a pair (with some models reaching a price tag of $300).

Expanding beyond headphones, Beats has delved into the automotive, smart-phone and personal computing sectors with Dodge, Chrysler, HTC and Hewlett-Packard incorporating the brand's technology (and, of course, logo) into and onto its products. After its 2012 acquisition of subscription music service MOG, Iovine and Dre are looking to launch a new service this summer branded under the Beats brand.

Add the recent success of their Interscope/Aftermath/Top Dawg Entertainment joint venture (which won 2012's critical rap acclaim via Kendrick Lamar's Good Kid, M.A.A.D. City, and has upcoming releases from the TDE Black Hippy collective on the horizon) and it's looking like Iovine and Dre have something to do with everyone's ears these days.