Hollywood Reebok Ashlee Simpson green top jeans

Seriously! Not only are we digging her cute but casual summer outfit, but the smile on Ashlee Simpson's face says it all. The singer slash actress was snapped leaving a Reebook event in Hollywood yesterday afternoon, and Bronx's mama was looking mighty fine.

But where has her sister Jessica been hiding out? We haven't seen her since she spent a total of 6 hours at two different doctor's offices in Beverly Hills yesterday, where numerous plastic surgeons have practices. Hmmm!