Goody's publicist Max Clifford has revealed that the reality star was "staggered" by the singer's generosity as she prepares to tie the knot with boyfriend Jack Tweed.
Speaking to The Mirror, Clifford added that Harrods owner Mohamed Al Fayed had gifted the former Big Brother star with a designer wedding dress after she visited the Knightsbridge store with Tweed over the weekend.
"She found the most beautiful dress. Mohamed Al Fayed heard about it and said, 'That's my wedding present to you two'," he said.
Guests at the lavish ceremony will reportedly include Sir Elton, Davina McCall and Jamelia, while Goody's mother Jackiey will give her away.
It is thought that the star is seeking a £3 million magazine deal for the event, which will go towards the trust fund that has been set up for her two young sons.
Clifford told Sky News that no date has been set but suggested that the ceremony will take place "in the next couple of weeks".
The 27-year-old previously revealed that she is desperate to wed Tweed after doctors broke the news that her cervical cancer is terminal.