Heartbroken Marie said Duncan James blanked her after their night of passion, refusing to even answer her calls.

But the singing lover was a star performer in bed. "He's got the most amazing voice," said Marie, 25. "He actually sang his tracks to me...between moans."

And Duncan, 25, right, slowly built up to a thrilling crescendo.

"He took ages exploring my body and was so gentle," said 32EE Marie. "He paid attention to every detail. As he made love he enjoyed watching us in the mirror. It was the best night of sex ever."

But after the three-hour session at Marie's north London flat, Duncan left saying he was off to make more sweet music—in the recording studio where they met. But she never saw him there again, or heard from him.

Duncan, whose hits with Blue include One Love, has since been linked to Liberty X star Michelle Heaton, Big Brother winner Kate Lawler, TV presenter Dani Behr...