Age ain't nothing but a number -- especially if you're Jada Pinkett Smith!

The 40-year-old actress and musician posted a smoking bikini pic of herself on Twitter over the weekend. Let's just say Will Smith is a very, VERY lucky man!

Jada Pinkett Smith, July 2012

"To my Forty and over crew! Don't believe the hype...we DO get better with age!" she tweeted to fans. Of course, it's not impossible to look amazing when you're over 40. Jennifer Aniston, Nicole Kidman and Halle Berry are just a few of the A-listers who are still turning heads after hitting that milestone!

What do you think of Halle's sexy bikini pic?

Photo courtesy of twitter.com/jadapsmith