Angelina Jolie took twins Vivienne and Knox back-to-school shopping Friday, heading to high-end retailer Ron Herman to prepare the kids for fall. The mother-of-six wore a sexy black silk cami (without a bra?!) with wide-legged pants and a Chloe bag. Her dark locks were pulled back in a tight ponytail.

Meanwhile, Angie's kids aren't so fashionable -- and we love it! They're ragamuffins in their too-short jeans (Vivienne), throwback high-tops (Knox) and retro puffer vest (Shiloh).

Speaking of Shiloh ... the gang headed to one of their favorite places -- a pet supply store -- to buy what appears to be a dog mattress. Shiloh struggled to carried the large bed to the car, straining as she attempted to figure out how to best position it in her arms. So cute! We wish we could see a pic of the family's at-home zoo -- we hear they've got LOTS of animals!