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Plus, other cult-favorite shades like Velvet Teddy, Spice, and more just for National Lipstick Day.

Ahead of traditional holidays like Labor Day, Halloween, and Thanksgiving, National Lipstick Day is celebrated by beauty enthusiasts across the country as a prime opportunity to show their love for the lip. In honor of today's special occasion, the makeup pros at MAC are offering an extremely rare buy one, get one free sale on best-selling lipstick bullets from select collections, including Matte, Satin, Amplified, Creamsheen, and Retro Matte.

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Although National Lipstick Day lasts for just 24 hours, MAC's limited-time sale runs in-store and online through Sunday, July 31, which is more than enough time to round out your makeup collection. As an added incentive to overhaul your favorite lip products, MAC customers who spend $50 or more will also receive a free Prep + Prime Lip with their order to hydrate and smooth dull lips. The colorless balm can be worn on its own or underneath your new lip color to set, moisturize, and smooth your shade.

As MAC is expected to sell one lipstick per second over the "holiday," we recommend getting your thumb and pointer fingers ready to snag your go-to shades, and cash in on this can't-miss beauty deal.