Black Eyed Peas star Fergie didn’t know she had to stop romping with girls when she got married, she has admitted.

The singer - who has confessed to same-sex trysts in the past - thought that sleeping with women didn’t mean she was cheating.

But her therapist told her it was forbidden, so she stopped.

She said: “I’ve had a lot of fun with women, and I’m not ashamed of it. The problem is that I also love a well-endowed man. But just because I enjoy women doesn’t mean I’m allowed to have affairs in my relationship.

“I learned through talking with my therapist that it is still cheating even if it’s with girls, so there is a rule there.”

Her comments, made in a US magazine, come after allegations that husband, Transformers star Josh Duhamel, had cheated on her with a stripper.

Both Fergie, 34, and Josh, 36, have hit back at her claims, branding her story “absolutely ridiculous”.