The 'Femme Fatale' singer has become only the sixth person in twitter history to reach the milestone following Katy Perry, Lady Gaga and Justin Bieber, President Barack Obama and most recently Kim Kardashian.
Although Britney has not yet acknowledged her achievement, fans will be hoping she follows in Kim's footsteps my marking the occasion with a giveaway.
She tweeted: "OOOMMMGGG I just realized that I hit 10 MILLION FOLLOWERS! Words can't even begin to express the love I feel for all of u!!!
"I gotta do something special for u guys! Let me think of something fab to show my appreciation!!!! (sic)"
The brunette beauty then promised to give away sets of products she has endorsed to a random selection of "loyal twitter followers" to mark the occasion.
She added: "I wanna give away 10 $1,000 gift certificates to Dash, 10 free 1month memberships to ShoeDazzle.com and 10 pairs of Skechers ShapeUps!
"Also 10 pieces of Belle Noel jewelry & 10 Kardashian Kollection for Sears clothes!!! So go to KimKardashian.com for details today!
"Oh and 10 bottles of my fragrance!!!! Thinking of more stuff too! (sic)"