Before walking the red carpet at the premiere of Confessions of a Shopaholic, Isla Fisher got decked out in an equally hot ensemble to do The Late Show With David Letterman last night. She showed off her natural Australian accent and made us laugh with a story about being mistaken for Sacha Baron Cohen's daughter at a Hollywood party. Dave also teased her about the photo of her turning cartwheels on the beach from last Summer. Isla took it all in stride with a big smile and plenty of giggles, and we're even more psyched to see her play leading lady when her film hits the theaters next week.
To see more photos and watch her full interview, just