Which episode of 'I Love Lucy' produced the longest recorded studio audience laugh in the history of the show?

Synopsis ~ When the chickens are not laying, Ricky threatens to get out of the egg business, meaning the Mertzes would have to move back to the city. To avoid losing her best friend, Lucy boosts egg production by buying several dozen eggs and pretending they are homegrown. But her plan to hide them in her blouse goes awry when Ricky asks her to help him rehearse a tango number for the PTA show. Lucy stuffs the eggs down her blouse and Ethel stashes a few dozen in her back pockets. Lucy tells her, “Whatever you do don’t try to walk like Marilyn Monroe,” continuing the show’s many references to the sexy symbol movie star. When Ricky pulls Lucy in for the final clinch… the result is the longest laugh in “I Love Lucy” history: 65 seconds (although IMDb clocks it at 67).