WORLD EXCLUSIVE: FLOYD MAYWEATHER'S FIANCE BETRAYS HIM . . . SHE'S DOING BUSINESS . . . WITH ONE OF FLOYD'S MORTAL ENEMIES!!!!

First Floyd had a falling out with rapper 50 cent . . . now it looks like it's MISS JACKSON'S turn to sh*t on the best fighter in the world. MediaTakeOut.com got EXCLUSIVE PHOTOS of a Spanish language commercial that Floyd's fiance Miss Jackson did recently. And guess who she stars with . . . VICTOR ORTIZ!! You remember Victor . . . he's the one that HEAD BUTTED Floyd on purpose - and then got KO'd by Money Mayweather's TWO PIECE. Hopefully Floyd can pull his inner circle back together. Cause we thought that him 50, and Miss Jackson made a great team.