Diane Lane is cornering the market on women lusting for liberation. She's following up her acclaimed turn as an adulterous wife in ''Unfaithful'' with ''Under the Tuscan Sun,'' a film loosely based on Frances Mayes' memoir about moving to Italy. ''This woman is coming off a horrific divorce,'' says Lane. ''She arrives brokenhearted and surprises herself by deciding she can't go back home.''
Lane, who spent last fall's shoot traipsing through Florence and Rome, admits to her own Italian obsession: ''Their ethics are based on quality of life and emotional exchange. It's very validating.'' Kind of like that long-awaited Oscar nod. (Additional reporting by William Keck)