The denim-on-denim look is one that has been memorably embraced by celebrity. That Britney Spears/Justin Timberlake red-carpet moment is obviously No. 1, but there are plenty of other low-key, off-duty interpretations of the Canadian tuxedo that feel a little bit more accessible (and easier to copy). Some key examples: Priyanka Chopra Jonas walking her pup in New York wearing a belted denim jacket with a matching skirt, Kendall Jenner on a summer’s day in head-to-toe American Eagle, Hailey Baldwin on a date with Justin Bieber in a Versace-branded denim jacket and jeans… These outfits don’t feel that far removed from something we’d wear on a weekend, especially as summer winds down and we move toward a more layered approach to dressing. Consider the eight looks ahead a primer on transitional fashion, featuring everyone’s favorite: denim.