Michael Phelps has ended his competitive swimming career and the winningest Olympiad of all time celebrated his retirement with a weekend-long bash in Sin City.
The fun started at Surrender Nightclub where he was joined by Olympic gold medalist and training partner Allison Schmitt, and his poker star pal Phil Hellmuth.
"He was met with deafening cheers from the packed house as he entered the DJ booth," an eyewitness tells us. He joined former Paris Hilton boyfriend, Afrojack, who was spinning the hits.
The celebration continued at Encore Beach Club as Phelps partied in a luxury bungalow overlooking the sea of pool partiers. He was again joined by Schmitt, and fellow Olympic gold medalist swimmers Nathan Adrian and Charles Houchin.
Nowhere to be seen though was Phelps' sexy model girlfriend, Megan Rossee.
Encore Beach Club’s bikini-clad servers even presented him with a cake paying tribute to his 22 Olympic medals.
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Even with all the partying, Phelps took time out to deny an Internet story that he'd won huge at the poker tables.
"I wish I won a 100k.... Haha not true tho:( ," he tweeted.