Britney Spears
Credit: Michelangelo Di Battista

It's true: Britney Spears is InStyle's January cover girl! The queen of pop broke the news during her visit to The Ellen DeGeneres Show Tuesday, where she showed off the gorgeous photo of her in Dior (which you can find on newsstands beginning Friday, December 13).

It's been quite a big week for Brit, who just celebrated her 32nd birthday on Monday and released her eighth studio album, Britney Jean, on Tuesday. For her chat with Ellen, the seasoned performer took a break from rehearsing for her two-year residency at Planet Hollywood Resort & Casino in Las Vegas (kicking off December 27), which Spears told Ellen "is probably the hardest show I've ever done."

We got a sneak peek of the show's rehearsal during our interview -- for details on what we found out, and to see Britney's photo spread (where she dons designers like Helmut Lang and Jason Wu), pick up a copy of InStyle's January issue, available on newsstands and for digital download Friday, December 13th. And stay tuned next week for more online exclusives on our upcoming feature with Britney, including a look behind-the-scenes at our cover shoot!

In the meantime, quench your thirst for all things BritBrit by checking out her beauty transformation.