Most of Facebook's adult supervision gave the Facebook Prom a skip, we hear. But not recently hired Google execs Elliot Schrage, now Facebook's top flack, and Sheryl Sandberg, the formidable new COO who's revising Facebook's internal social graph day by day. We heard Schrage and Sandberg were tight at Google, but close enough for this "me-and-my-bitches" pose captured at the Facebook Prom event held two weeks ago? (Camille Hart, Sandberg's assistant, is on the left; she also followed Sandberg to Facebook.) Suggest a caption in the comments, and the best will become the new headline. Yesterday's winner: abmw, for "They never have enough restrooms in these Apple Stores."

It's true: Facebook held a prom for its employees in San Francisco last night at the Metreon. The shopping mall-cineplex's fourth floor was tastefully decorated with white flowers, and the gathered Facebookers were dressed up — and so youthful, you might think it was an actual prom, save for the booze being poured at the open bars. (Ubiquitous photographee Julia Allison, who was invited, did not attend, staying in New York for a book party instead.) Why throw a prom? Facebook is going all-out for prom season this year, with a tie-in to Sony's Prom Night and a prom-dress partnership with Sears. Why not reward employees working on prom marketing campaigns with a throwback prom of their own?

Congratulations, Facebookers! Notorious New York nobody and Silicon Alley wantrepreneur Julia Allison plans to grace your "Facebook Prom" with her presence. She twitters: