Nicole Richie gym hat scarf sunglasses Studio City

Yesterday Nicole Richie made her daily trek to the gym in Studio City, and the starlet tried to hide under a pair of shades and one of hubby Joel Madden's fedoras. We're guessing he's not going to want this one back after Nicole's sweaty head has been in it...

We kid, we kid. Not only do we admire Nicole for her motivation when it comes to hitting the treadmill, but we're totally envious of her toned bod. It's not even bikini season yet and she's already putting the rest of Hollywood to shame!