Cardi B is here to protect us all aganst a common enemy: overpriced denim.

The "AH HA" rapper is starring in the new Most Wanted Denim campaign for Old Navy, accompanied by Brooks Nader, Haley Baylee, Quenlin Blackwell, Paloma Elsesser and Wisdom Kaye, and they're all rocking the hottest (on-sale) jeans for fall.

Cardi's jeans of choice? The Extra High-Rise Wide Leg, marked-down right now to $39.99 and available in multiple washes. But when you use the code EXTRA to save an extra 30% off your favorite jeans, it brings the artist's favorite pair down to only $27.99. Plus, they're available in a curvy variety with a roomier leg and fuller hips.

Shop all of the featured denim and see how these celebs are rocking them, below.

These jeans have a roomy wide leg and long silhouette that gives you legs for days, with the option of a cuff at the hem. Need a little more room in your legs and hips? The curvy version is the style for you!

Beyond your basic barrel jean, these have a curved and tapered leg with proportion play from hip to hem.

Looking for your dream low-rise jeans? We found them! These have an ultra-baggy silhouette, with a low-slung fit.

Want a barrel jean that's a little less tapered? This pair hugs at your hips but fits slightly baggier through the leg. 

Talk about a show-stealer! For the ultimate "legs for days" fit, go with an extra high-waisted pair like this, that snatches at your waist with a touch of stretch.

The guy in your life will love these 90s-inspired loose jeans that are ultra-relaxed through the hip, thigh and leg.

Looking for more? Madewell's new fall sweater collection is already on sale now.

The E! Insider Shop editors and writers search the internet to find the best products out there. We interview expert sources, comb through customer reviews, and use our own personal experiences to make shopping easier for our readers.

As an editorial team, we independently create content and determine coverage based on research, reporting and what we think our readers would like to read about. The goal of our content is to provide a service and inform readers who are on the hunt for the latest products to help make their life better. Items are sold by retailer, not E!. Pricing and availability are accurate as of publish time.