The No Doubt rocker let it all hang out at the L.A. premiere of Paul McCartney's music video for his single "My Valentine" in this Stella McCartney jumpsuit and Louboutin heels. But you can't show that much skin and not expect our gal-pal Joan Rivers to notice!
"I knew Gwen had soul," the Fashion Police host joked. "I didn't know she literally had a small black woman trapped inside of her."
Click to see all of Joan's jokes that didn't make it on air in our sassy sartorial photo gallery.