Rhyme-spitting rap royalty like The Notorious B.I.G., Jay-Z and 50 Cent have all sung about it and now musician Lenny Kravitz is signing bottles of it. On Aug. 5, 2009, Kravitz (and his collection of piercings and tattoos) will be spotted scribbling his famous name on bottles of Dom Pérignon Rosé in the southern French …