Annie Leibovitz, 1991. Pregnant Demi Moore nude on the cover — the most-copied magazine cover of the decade.
From Wikipedia
More Demi Moore or the August 1991 Vanity Fair cover is a controversial handbra nude photograph of then seven-months pregnant Demi Moore taken by Annie Leibovitz for the August 1991 cover of Vanity Fair to accompany a cover story about Moore.