Kathy Hilton’s favorite sunscreen is on sale for just $4 — but only for 24 hours

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For those stocking up on skincare, today’s deals are hunky dory .

Shortly after Kathy Hilton revealed she can’t live without Bliss Block Star Invisible Daily Sunscreen ($25 $4), the brand is slashing its price to just $4 — a staggering 83% off — for 24 hours.

The “RHOBH” alum sang the tinted product’s praises in a recent Strategist interview , saying she has “very sensitive skin.”

“I have tried so many different sunscreens, and it seems like somehow, the sun still gets to me,” she explained. “This one’s the best at protecting my skin … I love the way it goes on.”

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Hilton added that the highly-rated SPF is also “actually a great primer,” should you prefer to layer it with makeup.

She’s not the only one who’s hooked; the formula’s racked up more than 1,600 five-star reviews on Amazon to date.

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“This product is a game changer for me,” one satisfied shopper wrote, while another added, “I have finally found a product I receive consistent results with that is also affordable.”

While Hilton’s a millionaire, she’s known to mix high and low on the regular. (After all, she once told Page Six she and husband Rick go to the Cheesecake Factory once a week .)

Her other can’t-miss products range from Lancôme Hypnose Mascara ($33) — the “latest and greatest” formula she’s tried — to the Lyma Laser ($2,695) stars and editors alike are obsessed with .

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“If I’m puffy in the morning, I’ll use it and see a big difference,” she told the Strategist of the high-tech beauty tool. “It’s like a Cinderella moment.”

If it’s her sunscreen you’re shopping, however, just be sure to add a tube to your cart ASAP; much like Cinderella, this deal won’t stick around past midnight.

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