BELLE DU JOUR: Actress Lisa Rinna is expanding her original Belle Gray boutique in Sherman Oaks, Calif., by 1,600 square feet and celebrating with a party with guests such as Tori Spelling (whose jewelry line, Maven, sells in the store) and Denise Richards. Other celeb-designed lines Belle Gray is adding are Elizabeth and James, Lauren Conrad and William Rast. The expanded space, designed and built by Rinna's husband, Harry Hamlin, also includes a shoe parlor with local lines that have branched into footwear such as Mike & Chris and Joie, as well as Tory Burch, Kors and Frye. Rinna, who also has a Belle Gray boutique in the Rick Caruso-owned Calabasas Commons shopping center, also in the San Fernando Valley, is planning a third store in Summerlin, Nev., to open next year.