8. DJ Mustard, '10 Summers'
L.A. producer DJ Mustard has been producing hit after hit all year with tracks that wobble in the hard-to-work middle ground between hip-hop, R&B and EDM — and make their point with all the subtlety of a slam-dunk. On 10 Summers his blurping synth squirts get yoked to a whirring G-funk smoothness that recalls classic Dre (see the Eazy-E homage amidst the vintage West Coast peacocking of "Ghetto Tales"). Mustard amasses a ton of starpower, including Rick Ross, YG, Lil Wayne and Big Sean without cluttering up the album's bright, laidback mood. J.D.