Jada Pinkett Smith wants the world to know she's 40 and fiiiine!

Will Smith's 40-year-old wife took to Twitter this weekend to show off her bikini bod -- posting a photo of herself in a colorful two-piece while on vacation in a very tropical locale.

"To my Forty and over crew! Don't believe the hype...we DO get better with age!" Pinkett tweeted along with the photo.

The mother of three is looking pretty good, isn't she?

See how her beach bod compares to other celebs' in the gallery above!

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