The celebrity perfume market is beyond crowded. Every pop diva and actress has her own perfume. Some, like Jennifer Lopez and Britney Spears, have multiple scents in their portfolios, since they started the branding process in the early '00s, just as celeb scents were coming into vogue. Not to be outdone, Lady Gaga launched her first fragrance, Fame, in September, and she's already sold a whopping 30 million bottles of the stuff. The perfume did so well since there was nothing else on the market like it.