The Black Eyed Peas singer, who wed Transformers actor Josh Duhamel on January 10, got to grips with a female dancer at a charity concert in Barbados.
The couple were in Barbados on the second phase of their honeymoon, after previously flying to the Maldives, when Fergie took time out of her holiday to perform.
Raunchy: Fergie gets to grips with a female dancer on stage at the Atlantis hotel in the Bahamas
As her proud husband Josh watched from the front of the stage, Fergie belted out her hits London Bridge and Big Girls Don't Cry as she writhed with a scantily-clad dancer.
Wearing a bottom-grazing Aztec print dress and thigh-high boots, Fergie showed off her newly-slimmed down figure as losing weight just in time for her big day.
The 33-year-old singer was performing at the MJCI Celebration Gala at Atlantis resort, which raises money for several charities including the Butch Kersner Summit Foundation, Make-A-Wish Foundation, The James R. Jordan Foundation.
Prior to arriving in the Caribbean, Fergie and Josh spent a week in the One & Only Reethi Rah Resort in the Maldives, where they had their own beachside villa and private pool.
Fergalicious: Newlywed Fergie wore his wedding ring on stage, along with her sexy ensemble
During the couple's sojourn to Barbados, they spent a lot of time in their luxury suite, with Josh emerging to take part in the Michael Jordan Celebrity Invitational Golf Tournament.
While husband Josh had nothing to worry about watching his new wife writhing on stage with a female dancer, the singer has previously admitted to enjoying lesbian experiences.
In a 2007 interview, she revealed: 'I have had lesbian experiences in the past. But I started having sex quite late on - after I was 18.
'I was raised a good Catholic girl. I won't say how many men I have slept with, although it's not many, but I am a very sexual person.'
Biker chic: Fergie did a costume change into a figure-hugging ensemble PVC leggings and black vest
Fergie and Josh married in a star-studded, Catholic ceremony at the Church Estates Vineyards in Malibu, California.
Among the guests were Kate Hudson, Kid Rock, Slash, Rebecca Romijn and Fergie's Black Eyed Peas bandmates Will.I.Am, Taboo and Ap.De.Alp.
Both the bride and groom wore Dolce & Gabbana, with Fergie draped in millions of dollars worth of diamonds.
Fergie fell for Duhamel after guest-starring on his former TV show Las Vegas in September 2004.
Before the couple met, Duhamel confessed to having naughty dreams about the singer in an interview with InStyle magazine.
He said: 'I can't tell you what happens, but I can tell you it involves Fergie. I've got the biggest crush on her! God, is she hot.'
