Forget a club or fancy restaurant — Floyd Mayweather celebrated his 48th birthday in ultimate style by throwing a massive party at the iconic Versace Mansion!!

The legendary boxer had the whole Miami Beach landmark to himself this week … proving once again a guy like T.B.E. needs way more than 24 hours to honor his special day.

Mayweather set up shop at the 23,000-square-foot estate with his family and friends … including Rick Ross (who also performed!) and Benny the Jeweler, who surprised Floyd with an iced-out chain featuring The Money Team logo.

Mayweather also received a four-tier birthday cake … which was seemingly designed to feature the New York buildings he recently purchased.

ICYMI, Mayweather bought the corner unit of 6th Avenue and 47th Street in Manhattan for over $20 million.

The Florida takeover started last week for Mayweather’s bash — over the weekend, he threw an All-White Beach Party at Joia Beach.

R&B singers Jacquees and Rotimi performed on stage for the 50-0 boxer … while his grandson, KJ, danced with him on the sand.