Parties! The style, stars and scoop from Hollywood's hottest events

Rihanna darted past the press line and into auditorium, eager to rehearse for her big performance of "Umbrella" featuring Jay-Z. The rap mogul took a different approaching to warming up, slowly maneuvering his way down the carpet. Though Jay admired Rihanna's glam look, he gave his own recipe for a well-dressed woman. "Simple things. Jeans, a tank top. And an exclusive, hot bag that doesn’t come out for 18 years," said Beyoncé's beau.