Surprisingly, Norwegians are less obese than Italians. Numbers for overweight or even average BMI are harder to find, though (I found some numbers for all EU countries, but that excludes Norway) - it's entirely possible that more Norwegians than Italians are overweight while the overweight Italians are more likely to go 'all in' so to speak.
Makes sense though, cheese bread isn't unhealthy per se, it's all about portion size and how much of your pizza is cheese. Also, the difference between the numbers for Norway and the USA is so small that it's pretty much a wash considering that Norwegians are quite a bit taller.
Knowing this makes the first track on Turbonegro's "Apocalypse Dudes" make more sense. The following clip is semi NSFW if your workplace is bothered by manakin nipples.