Nicole Richie: Gym Junkie

Nicole Richie wears her hair in a bun as she heads to the gym on Monday (September 17) in Studio City, Calif.

After her workout, the 30-year-old fashion designer walked back to her car and took off.

PHOTOS: Check out the latest pics of Nicole Richie

The night before, Nicole rocked a black Mathieu Mirano dress at the 2012 ALMA Awards.

Last week, the blonde beauty was spotted at a party, celebrating her DuJour magazine cover.

10+ pictures inside of Nicole Richie going to and from the gym…