She tackled the world of Reality TV, and just became a brand new mother, but apparently Nicole Richie already needs a new challenge: jewelry design.

The “Simple Life” babe was spotted on her way to Mo’s Fine Food restaurant yesterday for a lunch date with a girlfriend.

And it looks like Nicole is taking her fashion cues from Sienna Miller, sporting a hippie-chic ensemble consisting on of a blue, green, and black summer dress with retro shades and a pair of sandals.

As for her upcoming jewelry line, “It’s all costume jewelry. I like to play with jewelry and mix and match. [I’m working with] this really talented woman named Shelley Gibbs. She’s an artist and she sketches everything.”

And when it comes to baby Harlow, Miss Richie keeps first things first. “Everyone’s been really mellow and able to work around my schedule. If I need to go feed the baby, I do it.”