Sales of denim are up, but it’s no longer just about jeans. The piece to know this summer is as straightforward and easy as they come: meet the denim boilersuit. Given that we’re only now ...

Lopez completed the unexpected ensemble with Y2K, ultra low rise low rise jeans in light blue that featured a subtle flare leg, and paired the denim with pastel pink peekaboo platform heels.

And ’60s-inspired miniskirts. Mary Lou Ryan: A pair of quality Japanese denim jeans are a must in any wardrobe. Alice McIntosh: A good corduroy suit and cowboy boots. Also, sheer polka dot tights!

When you think of an ideal holiday party outfit, velvet suits, sequin and feathered dresses ... appropriate for any year-end bash. Can denim be dressy? J.Lo says yes—if you add a snazzy blazer ...