floyd mayweather is thought to have net worth between $ 280m and $ 300m .
mayweather has earned $ 400m during his boxing career .
the boxer is not afraid to splash the cash and show it off .
he is partial to buying the odd super car and also owns a private jet .
mayweather takes on manny pacquiao in las vegas on may 2 .
mayweather and mariah carey pose as pacquiao sings with jimmy kimmel .
click here for all the latest floyd mayweather vs manny pacquiao news .