Hollywood hits a new l'eau. The gardenia-scented potions from Kai have won fans like Barbra Streisand, Jennifer Garner and Tyra Banks. "It's just a yummy smell," Banks says. But the real draw was exclusivity: only one Malibu shop carried it. Now several do, and kaifragrance.com launches soon. Only the prices are B list: $40 for oil, $30 for lotion.