Sure what else would you be doing on your 33rd birthday apart from cartwheeling around a grassy knoll in a bikini. Well, everyone's saying she's cartwheeling - I reckon it's more of a back flip, or an enthusiastic variation of The Crab, or essentially something from the Kama Sutra, but either way she's doing it in a bikini, hence the universal interest.
Beyonce captioned the above "Thank y'all so much for my birthday wishes ! ðŸ??ðŸ??33!!!!!" Next year we want the mid-air splits in a wooded area, please.