The former Baywatch star became the butt of harsh jokes at Sunday's (01Aug10) event, which was attended by his former TV co-stars Pamela Anderson, Gena Lee Nolin and Jeremy Jackson.
He even parodied his image in an ad for the show, in which he donned his famous red beachwear and washed a car similar to his old Knight Rider TV model.
But, in an interview with ETonline.com shortly before the roast, Hasselhoff insisted no gaff, no matter how harsh, could hurt his feelings.
He said, "Nobody laughs more about David Hasselhoff than David Hasselhoff - nobody.
"Nobody laughed harder at Baywatch than I did. I thought sometimes it was the most hysterical show ever - but people loved it."
The roast, featuring comedienne Lisa Lampanelli as roast mistress, is set to air in America on 15 August (10).