Not since that whole Garden of Eden situation has an Apple caused such a craze. Of course, we mean Apple Blythe Alison Martin, 3-month-old trendsetter. Ever since Apple's mom, Gwyneth, started wearing a necklace featuring the fruit, jewelry company Alex and Ani has been inundated with requests for the $68 piece. ''It's inspired me to do some more apple-designed things,'' says Alex and Ani's Carolyn Rafaelian, who received a personal thank-you note (on Apple's stationery, natch) from Gwyneth. ''I'm going to make little Apple bobby pins and send them her way,'' Rafaelian promises. ''As soon as she grows some hair.''