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

In honor of their stylish new collection of clothing and beauty products, Old Navy converted a massive downtown loft space into a chic multi-media style carnival for a pre-fashion week bash. Gossip Girl stars Blake Lively and Chace Crawford (not pictured) watched as British songbird Natasha Bedingfield belted out hits like "Unwritten" and "These Words," and lucky guests like Kristen Bell, Sophia Bush, and Hayden Panettiere left with lots of samples from the brand's new fashion-forward collection.