Earlier this year, the Jersey Shore reality star surprised fans when he entered rehab for a prescription drug problem, but luckily, the abtastic Jersey boy is now doing better than ever.
Wish The Sitch a very happy birthday in the comments below and click through the gallery to see his infamous six-pack abs.
The festivities are sure to be a blow out bash today.
As Celebuzz previously reported, his pregnant co-star Snooki was spotted on her way back to the Jersey Shore house in Seaside Heights, N.J. on Tuesday, pushing around a baby stroller filled with booze.
Dressed in an over-sized shirt and zebra print flip flops, Snooki hauled around a full case of Coors Light beer and bottles of soda for her cast mates.
For more party prep photos from the cast click through the gallery above and check out the most impressive abs in Hollywood in the video, below.