Beyonce Knowles' tumblr is a treasure trove of personal pics from the superstar -- and today, she's unveiled one of the sexiest shots yet!

In a brand new pic on her official website, the 31-year-old mother-of-one shows off her killer bikini body while sporting very minimal makeup.

And, of course, she still looks amazing.

Since signing up to tumblr, Bey has posted pics of herself voting for Barack Obama, exploring Texas with her girlfriends, vacationing with hubby Jay-Z and concert-hopping with baby Blue Ivy.

Check out our favorite shots she's shared so far above!

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