Hollywood hits a new l'eau. Kai's Gardenia-scented potions won fans like Barbra Streisand, Jennifer Garner and Tyra Banks. "It's just a yummy smell," Banks says. But Kai's real draw was exclusivity: only one Malibu shop carried it. Now it's at the Lisa Kline Boutique in Beverly Hills and Malibu's Planet Blue, and kaifragrance.com launches soon. Only the prices are B-list: $40 for oil, $30 for lotion.