Rachel Bilson fuschia skirt Wheely Bug

Rachel Bilson is very conservative when it comes to her modes of transportation -- she drives a Prius hybrid and Friday she picked up a vehicle that runs completely on human power ... a ladybug-shapped Wheely Bug!

We're pretty sure this little car isn't for Rachel ... maybe for her younger sister Hattie? Or, more likely, for a friend's toddler.

The Jumper actress sported a color-block look with a billowy orange skirt, a black blouse and a Tiffany blue Chanel bag. Love this summer style!