Flashing a megawatt smile needn’t cost mega money.

Stars like Alix Earle often rely on Crest to keep their pearly whites in tip-top shape — and right now, during Amazon’s Big Spring Sale, the brand’s 3D Whitestrips ($46 $40) are majorly marked down.

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When a TikTok user asked Earle for a teeth whitening recommendation in April, the social media phenom name-checked none other than Crest in her comments section.

She’s similarly spotlighted Crest products in her own Amazon storefront — where several of her other picks are on sale right now, including a Eucos Phone Tripod ($37 $23) perfect for snapping photos of your freshly brightened smile.

Earle isn’t the only famous face using Crest Whitstrips; Ashley Graham used one of the kits to get red carpet-ready for the Met Gala in 2017, as seen in a behind-the-scenes sponsored snap.

And Matt Rogers shouted out the 30-minute version of the product in an interview with Page Six Style this year, saying they “do the trick.”

“I can’t really deal with teeth that look a mess,” the “Las Culturistas” co-host added.

Reviewers are on the same page, as the strips have racked up over 84,000 largely positive reviews and a 4.6-star ranking.

“They are super simple to use,” raved one, while another noted that each strip “stays put and doesn’t move” during the treatment.

For more Amazon Big Spring Sale deals, don’t forget to check out our guides to the best beauty buys and all-around major markdowns up for grabs right now.