She is quoted by Britain's The Sun newspaper as saying: "Put it this way,I've experimented definitely, but I have never had a steady girlfriend."
The 34-year-old singer - real name Stacy Ann Ferguson - is currently enjoying success with The Black Eyed Peas' latest track 'Boom Boom Pow' which has topped the charts in the US and the UK.
However, Fergie says she is more excited about the band's next single because the promo features steamy "girl-on-girl" scenes.
She explained: "You'll like our next video, for 'I Got A Feeling', because I have a little girl-on-girl tease section of the video.
"I met the girls right before we did the scene. They were beautiful. They were hot."
"One of them was the director's girlfriend - so he was happy!"
Fergie is not the only star to admit to having relationships with both men and women.
Josh's 'Transformers' co-star Megan Fox, 23 - who is dating Brian Austin Green - recently admitted she is attracted to women.
She said: "I have no question in my mind about being bisexual.
I think people are born bisexual and they make subconscious choices based on the pressures of society."
'Mean Girls' actress Lindsay Lohan enjoyed a tumultuous relationship with DJ Samantha Ronson, while 'Poker Face' singer Lady Gaga also claims to enjoy romancing women.
- Bang! Showbiz
