Sodoff said:
He's a male model who is famous for being "the most desirable man on the planet" he's pretty much the dude every girl is into, but will never admit it. He's been on the cover of literally hundreds of "romance" and "adult" novels.
http://en.wikipedia.org/wiki/Fabio_Lanzoni
For those of us who are not women he's famous mostly for two reasons, one is his series of "I can't believe it's not butter" commercials where he has "dreamy" scenes with ordinary house wives to pimp the product... and well, he probably sold tons of the stuff to shopping housewives, while the effective but really obvious style of the commercials lead to widescale mockery (and later self-parody within the commercials). The second is that he had a recurring role in the first season of an action TV series called "Acapulco HEAT".
http://en.wikipedia.org/wiki/Acapulco_H.E.A.T.
The show is pretty much "by the numbers" but kind of famous by trying to hit so many mainstream and left wing target buttons that it's almost insulting to it's audience. The basic premise being a modeling agency operating out of a world class hotel in Acapulco run by Fabio is actually a group of special operatives run by the UN, which was a paticular selling point in a lot of circles since it wasn't the US, and involved characters who weren't by origin American... you know like the "exotic" gimmick of an MI-6 Agent being a main character for those who hadn't watched say James Bond or "The Equalizer". It was just so head bangingly trying to be liked by what was perceived to be the mainstream and an "action show for the non-conservative US Redneck audience" that it could be painful to watch, without there actually being anything really wrong with the storylines or acting... At any rate having Fabio walk through occasionally as the Hotel Manager was one of the things that got attention for the show, especially as he is a REAL world class male model, ironically playing house keeper/landlord for the pretend models at "The Agency".
While unrelated to Fabio, if the mention of an MI-6 agent, and superspies as international models makes you think of "Austin Powers", well you wouldn't be alone in this. It's widely believed Mike Meyers was inspired in his satire in part by this show, and it hasn't gone unnoticed that the attempt at a relaunch in 1997 (the second season) kind of came along right with the Austin Powers movies, probably hoping to catch some attention on it's coattails.