Martha Stewart is 81 and glows all over with this serum that costs $18.

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Martha Stewart flaunted her flawless skin on the Sports Illustrated cover.According to the star's makeup artist,

she gets her beach-ready glow from the L'Oréal Paris Beach Bae Face and Body Liquid Luminizer.

Reviewers adore the top-rated item, which costs only $20.

With her 81-year-old Sports Illustrated swimsuit cover, Martha Stewart has caused a ruckus among fans.

In every picture, the actress displayed her glowing skin, leaving us to ponder the source of her all-over shine.

Fortunately, Stewart's makeup artist recently disclosed that she gave ,

Stewart the tan with L'Oréal Paris Beach Bae Face and Body Liquid Luminizer.

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