Mayweather was seen inside the French label's London store as he showed off his buys on Twitter later in the day.
The Michigan-born sports star also ensured to make a statement when it came to his sartorial choices and he rocked a unique - and no doubt high-end designer - hooded jumper which was emblazoned with a quirky face motif.
He wore a blue jeans and some black and yellow Nike trainers. Mayweather's shopping bags were displayed all around him and his nonchalant attitude to his super-expensive spree certainly entertained his followers.
Mayweather was seen nipping in and out a string of luxury stores which he had the pleasure of browsing in private as staff barred any other customers from entering.
Showing off his bedazzling wrist watch
He visited the Christian Louboutin flagship from which one male member of his team exited with no less than five bags filled with the famed designer's red-soled shoes. The boxing champion then hot-footed it to Balmain with six male companions and three females prioritising his safety at all times.
Member of his team exiting Christian Louboutin with stacks of carrier bags.
He appeared to have bought much of the shop's stock as he shared a photo showing nine bags filled to the brim with brand-new designer goodies.
The super-rich champ played down his spending spree by captioning the picture: 'Did a little shopping today.'