If you 19re going to spot a celebrity, chances are it will be at Nobu Malibu (3835 Cross Creek Road, in the Malibu Country Mart; 310-317-9140; www.nobumatsuhisa.com), one of the famed chef Nobu Matsuhisa 19s many restaurants. The sushi ($6 to $12 for a two-piece order) is sublime, and the pan-seared scallops with cilantro sauce ($16 for a two-piece portion) are a favorite. Dinner for two is about $100 without wine, and reservations are essential. The front room is convivial but noisy; the subtly lighted back room is quieter.