At the time, Miss Gregorini said she was 'blissfully' happy, and added: 'I thought being happy would affect my songwriting. But I am truly happy and my writing hasn't been affected.
'I was a late bloomer sexually. I was a tomboy until I was 18. I had boyfriends but I never understood the whole hoopla about sex.
'Then, when I discovered girls, it was like, "Aha, now I get it!" I was 19 years old. I knew I was a lesbian.'
Miss de Rossi - who was once romantically linked to Hugh Grant, her co-star in the 1994 film Sirens - is known for her role as man- eating lawyer Nell Porter in the legal drama Ally McBeal.
Miss DeGeneres, who had been 'engaged' to her ex-girlfriend Miss Hedison, 35, famously came out of the closet on her hit sitcom Ellen in 1997.
Viewing figures for the show subsequently plummeted and within a year of the episode it was cancelled.
For Miss DeGeneres, 46, breaking up other people's relationships is becoming something of a habit.
When she met Miss Heche, the Six Days, Seven Nights actress was involved with actor Steve Martin. Miss Heche subsequently dumped him for her lesbian lover.
Agents for Miss DeGeneres and Miss de Rossi were not available for comment last night.