But not before she shared this super-cute photo of herself from way back when.
Mrs Carter, aka the best performer of all time, was inundated with birthday wishes from across the globe (she had more than 633,000 mentions on Twitter) and the best one of all came from Mr Carter himself.
Jay Z posted this behind-the-scenes video from their 'On the Run' tour on his website Life + Times, you need to see this...
Despite the fact that Bey and Jay Z are clearly still (always have been) head over heels for each other, rumours over their split continue to make headlines.
The latest is that the couple will break up following their tour - which ends 14 September - though, Jay's video implies otherwise. They got the love.
This was Michelle Obama's birthday message to the Bey-day girl.
Happy Birthday, @Beyonce! You're an incredible role model, a phenomenal mother, and a wonderful friend. Hope you have an amazing day! –mo
- The First Lady (@FLOTUS) September 4, 2014
We couldn't agree with the FLOTUS more.
LOVE QUEEN BEY? Take a look through this gallery to see more incredible looks from the 'Single Ladies' singer and be prepared to love every outfit.
MORE! Watch this video to get more details on how she spent her birthday celebrating with the family - think maxing and relaxing along the beach in Corsica. It's an annual tradition.