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    Beyoncé Starts Second 22-Day Vegan Challenge With Chocolate-Flavored Protein Bar and Sliced Bananas

    Beyonce, Instagram Instagram; Kevin Mazur/WireImage

    It's very clear from Beyoncé's Grammy performance Sunday that Jay Z's wife takes very good care of her body.

    And just how does Blue Ivy Carters mama pull off a fit while still curvy look like that? It might be thanks in part the 22-day vegan stint she did ahead of Hov's 44th birthday in December. And it certainly seems, from her latest Instagram post, that she's embarking on another 22-day challenge of eating no meat or animal products whatsoever!

    On Jan. 29, the 32-year-old "Drunk in Love" singer shared a snap of her healthy snack—a peanut butter and chocolate chip flavored vegan protein bar bar cut up with sliced bananas on top. Bey captioned the shot of her no-gluten, no-soy, no-dairy snack simply, "#22daysvegan." (We're assuming this is vegan stint no. 2 and not a throwback to the first one—that'd be odd, even within the foodie culture of Instagram.)

    PHOTOS: Blue Ivy, Beyoncé and Jay Z's cutest family photos

    So why is Beyoncé going vegan for 22 days, as opposed to 21 or 23? Hubby Jay Z explained on his  Life + Times blog before challenge no. 1 that "psychologists have said it takes 21 days to make or break a habit. On the 22nd day, you've found the way."

    He said at the time switching to a "plant-based" lifestyle "just feels right," calling it "a spiritual and physical cleanse" of sorts.

    No word yet on whether Hov is joining Queen Bey in challenge no. 2!

    PHOTOS: See what Bey was eating on her first 22-day vegan diet!