Michael Phelps: Shirtless Retirement Party!

A shirtless Michael Phelps is all smiles as he celebrates his retirement at Encore Beach Club on Sunday (September 2) in Las Vegas.

During the bash, the 27-year-old Olympic gold medalist gave fellow Olympian Allison Schmitt a big hug.

PHOTOS: Check out the latest pics of Michael Phelps

Michael ended his Olympic career with a record 22 medals, well more than any other athlete has received.

In case you missed it, make sure you check out Michael‘s limited edition Wheaties box.

10+ pictures inside of Michael Phelps at his retirement party…