The good, the bad and the ... Rihanna!
From the high-fashion events to the stylish streets, Hollywood's hottest starlets stepped out this week in their favorite couture creations.
While some leading ladies dazzled in their designer duds -- we're looking at you, Katie Holmes and Dakota Johnson -- other celebs, including RiRi, Kylie Jenner and Beyonce earned failing fashion grades for their wardrobe faux pas.
Check out the clip above to see who toofab's Candice Brock and Anna Kachikyan and celebrity stylist Audrey Brianne picked for the best and worst dressed stars, and take a closer look at the week's bad fashion below!