James Devaney/WireImage; Steven A Henry/Getty Images
This fashion rumble takes place in the concrete jungle (New York!) where Perry wore a yellow version of the spotted frock with T-strap peep-toe heels back in June.
Williams, meanwhile, accessorized her orange D&G slip dress with a black leg cast at a Hamptons magazine party at the end of August.
So whose wildcat style reigns supreme—the Teenage Dream singer or the fierce but clunky-footed tennis pro?
And check out the sneak-peek clip of tonight's Fashion Police after the jump for some other jacked fashion.