Floyd Mayweather -- Still Flexing over De La Hoya Victory ... With $100k Painting

'Memba when Floyd Mayweather beat Oscar De La Hoya in 2007? Floyd does ... and he commissioned a $100k painting to honor the victory ... TMZ Sports has learned.  Mayweather hooked up with famed charcoal painter Dave Hobrecht ... who tells us…

Amber Brkich Amber Heard Amber Valletta America Ferrera