Duff's 9-month-old keeps busy with a teething toy in Beverly Hills. Plus: Tia Mowry, Hugh & Russell, Khloé Kardashian and more

ICE, ICE, BABY

Looks like diamonds are a girl's best friend! A beaming Mariah Carey accessorizes her winter gear with a few lavish jewels during a shopping spree in Aspen, Colo., on Thursday.