Plot: What would Design Star Hollywood be without a challenge involving celebrity clients? The three remaining designers face off as they decorate a home office for Kathy Griffin, a guest bedroom for Tiffani Thiessen and a baby's nursery for Jason Priestley. With 30 hours of work time and a budget of $20,000, only two designers will survive to compete for a 50-50 chance at winning their own show on HGTV