Here at Bazaar.com, we love a good beauty deal—especially when it's on best-sellers from Sunday Riley. Now through July 4, the beloved skincare brand is offering a rare 25 percent off flash sale on all of their full-sized products and kits, which our editors—along with a number of celebrities like Lizzo, Helena Bonham Carter, and Drew Barrymore—swear by, including the cult-classic lactic acid serum, Good Genes.

Sunday Riley Good Genes Lactic Acid Treatment

Good Genes Lactic Acid Treatment

Sunday Riley Good Genes Lactic Acid Treatment

$122 at sundayriley.com
Credit: Sunday Riley

The clarifying staple is one of Barrymore's holy-grail go-tos, with the actress and talk show host sharing with her 16.5 million followers, "I’ve been using this product one to two times a week at night and love the results!"

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Good Genes's multi-tasking treatment works to exfoliate skin and boost its radiance while reducing the look of fine lines and dark spots. In addition to lactic acid, its formula also features licorice, lemongrass, arnica, prickly pear extract, along with aloe, to soothe irritation. Whether you're looking to refill your empties or test out the serum for the first time, Sunday Riley shoppers can take advantage of limited-time markdowns on Good Genes's 0.5-ounce, 1-ounce, 1.7-ounce, or 3.4-ounce sizes.

And if you're looking to round out your routine with a few more Sunday Riley essentials, we highly recommend taking advantage of discounts on the brand's C.E.O 15% Vitamin C Brightening Serum, Auto Correct Brightening and Depuffing Eye Contour Cream, and more. Plus, customers can even save up to 40 percent off with additional discounts on select products. Did we mention that customers also receive free shipping on U.S. orders?

Shop More of Sunday Riley's Best-Sellers

On Sale
Auto Correct Brightening and Depuffing Eye Contour Cream
Sunday Riley Auto Correct Brightening and Depuffing Eye Contour Cream
Now 25% Off
$49 at sundayriley.com
Credit: Sunday Riley
On Sale
15% Vitamin C Brightening Serum (1.7 Oz.)
Sunday Riley 15% Vitamin C Brightening Serum (1.7 Oz.)
Now 25% Off
Credit: Sunday Riley
On Sale
B3 Nice 10% Niacinamide Serum
Sunday Riley B3 Nice 10% Niacinamide Serum
Now 25% Off
Credit: Sunday Riley
On Sale
All About Acne Set
Sunday Riley All About Acne Set
Now 25% Off
Credit: Sunday Riley

While few things beat running outside during a rain storm and enjoying the fresh air, this Fourth of July sale comes pretty close, which is just one of the reasons we recommend snapping up these skincare deals before they come to an end this Wednesday.