It's enough to give an old man a heart attack -- Playboy magnate Hugh Hefner's 82nd birthday present from Pamela Anderson was a cake hand-delivered by her ... in the nude.

While the lad mag tycoon's birthday was actually six months back in Las Vegas, fans of the reality show "The Girls Next Door" got a blurry eyeful - thanks to the censors - when the episode aired Sunday night.

Witnessing Anderson's privates first hand were Hef's three girlfriends, Holly Madison, Bridget Marquardt, and Kendra Wilkinson.

Hef got a handful, as the 41-year-old former "Baywatch" beauty gave him a racy lap dance, clad only in her high heels.

Anderson, who's been featured on Playboy's legendary pages more than a dozen times since 1989, showcased a body that defied her age.

The Daily Mail reported that she "was still in great shape and confident with her body as she performed in front of Hugh and a bevy of Playboy Playmates in the hotel suite" at the Palms.