Megan Markle, Katie Holmes, and Jennifer Lopez agree that this sweatshirt trend is a summer must-have

Summer style is usually synonymous with fabulous dresses, ripped shorts, and tons of swimwear, but one wardrobe element is proving to be pretty hot these days.

Megan Markle wore it to cheer up Prince Harry when he recently attended a polo tournament in Los Angeles; Katie Holmes took him around New York in the most carefree way possible. Jennifer Lopez played favorite while out on SoCal with him Ben Affleck.

So what do we mean by mysterious "that"? We're talking about closing, blouse styles that know no bounds, so we think this is the best summer to have.

Of course, buckles can be stuffy office wear at times, but the styles we're seeing especially how they're in shape today prove that the main body is just as casual as your trusty sneakers.

The best part? Nordstrom is a treasure trove of simple, cool buttons that cost less than $100. So, if you're looking to get into the significant fashion trends this summer, you don't need to shell out right away.

Buy the best knobs on Nordstrom.

Buttons can be worn for almost any occasion; it depends on how you style them. Opt for baggy pants and heels for a formal office look, and you'll be ready to enter the meeting room in style. For a more down-to-earth approach, we recommend Markle, who recently wore a button-down blue striped look with white shorts and straight pants, or Holmes, who applied a "French twist" to her blouse, pairing it with jeans or cargo pants.

For example, light linen blouses feel lighter and more relaxed, while poplin blouses have a more structured and refined feel. Purchase some of our favorite buttons at Nordstrom, inspired by the buttons worn by celebrities like Markle, Lopez, and Holmes.