Sextette (1978)

Glamorous silver screen sex symbol Marlo Manners is enjoying her honeymoon with Sir Michael Barrington, husband number six. As luck would have it, an international conference is at the same hotel and the Russian delegate is threatening to derail negotiations unless he can have one more fling with Marlo. Adding to the complications is a tape Marlo has made detailing all of her affairs and scandals, which her manager is desperately trying (and failing) to destroy.