We hear that Cold Stone Creamery will soon be joining the food lineup at Westfield Montgomery Mall, opening early next year. Arriving sooner — probably around New Year’s — will be Chipotle and CRAVE American Kitchen & Sushi Bar. In non-food news, the Kiehl’s skin-care store opens tomorrow (Dec. 19) at 11 a.m. with “mystery gift cards” for the first 50 customers.