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It seems nearly everyone has a signature beauty secret that they love to use to enhance their makeup routine.

“Florence is made with love by Millie Bobby Brown (a.k.a.

Millie Bobby Brown poses looking over her shoulder with a smile.

The great news is, its' simple, affordable, and easy to find.

She urged everyone to “use castor oil for your eyelashes.”

Brown told Glamour, “don’t exfoliate every day!

Millie Bobby Brown poses in white with a smile.

It sounds like something you wouldn’t want to learn the hard way for sure.