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

Caught between designers Chip and Pepper, Rachel Bilson couldn't stifle a smile at launch party for the duo's denim line at JC Penny, held at the Sunset Tower hotel. Mary Lynn Rajskub, Bonnie Somerville and Steven Cojocaru also got a sneak peek at the latest collection during the Hollywood soiree.