After seven seasons filled with models, exotic locales, and schmoozing, the holy grail of testosterone television, HBO's Entourage, is finally coming to a close with its eighth and final season, which premieres this Sunday night. We're going to miss the booze, babes, and mayhem, but also the regularity with which Vince and the boys hob-knobbed with our favorite celebrities. With cameos as endless (usually one or two major celebrities, often half naked or half baked, per episode) as Vince's many sexual conquests, you may have forgotten some of the gems that HBO has provided, but we haven't. So, sit back, relax, and gaze at the stars as we count down Entourage's 15 Craziest Celebrity Cameos.