If you lose 75 pounds in 3 months, it's certainly not all fat. He lost water weight, muscle, even skin. This drops the calories required. His "no exercise" also

If you lose 75 pounds in 3 months, it's certainly not all fat. He lost water weight, muscle, even skin. This drops the calories required. His "no exercise" also wasn't the same as sedentary. He does shows in Vegas six days a week.