The Welsh designer, famed for a celebrity client list as long as Jodie Kidd's legs, lured the tempestuous model back for the high-octane showcase in central London which proved to be the real highlight so far of Fashion Week.
Opening the show in a white lycra swimsuit, Campbell raised gasps of astonishment around the auditorium as her low-cut outfits drew attention to the massive diamond necklace, worth just over stg£8 million, which dangled from her neck.
"I love diamonds and Naomi adores them, she's a very glamorous woman," said MacDonald backstage following the show.
Casually sipping champagne in the packed backstage area, Campbell conceded that the designer was one of her all-time favourites: "I loved the black mesh dress I had on, Julian's clothes are so amazing, he's one of my favourites."
With celebrities like singer Martine McCutcheon watching in amazement from the front row, MacDonald sent a hot and tropical range of printed and highly adorned outfits down the catwalk in his Paradise Island show.
A gold catsuit, slashed to the navel, and body-moulded silk in every shade were the highlights of his new range of fruity showstoppers.
Earlier on Saturday, Dublin-based designer John Rocha took inspiration from the shape of a woman's torso for his new collection, which was staged at the Royal Opera House in Covent Garden.
Once again, natural fabrics including silk, linen and cotton were dominant on Rocha's catwalk, with jackets and trousers washed like the finest antique bed sheets to give a slightly creased, sun dried appearance. Antique beads and braiding were sown on to jersey tops and distressed lace was used to create a patchwork feel on dresses.
The collection, for spring/summer 2003, focused on various shades of cream, cloud, broken cloud, oyster and black highlighted with metallic hues of pewter and silver, while sharp lines were all but abolished.
"It's a very Irish looking range in a lot of ways, lots of Celtic swirls and handpainting. I've modernised the natural fibres which I always use and I think it's very sexy," said Rocha backstage after the show.
Having enjoyed a 60 million turnover from his various design interests last year, the Hong Kong-born designer has been no-less busy this year and is currently planning to launch his latest project a book which charts his 21-years in design in Dublin early next month.
"It's a look back at everything I've done over the years and there are wonderful illustrations," said the designer. Hosting his off-schedule show on the Brompton Road yesterday afternoon, Irish designer Pauric Sweeney wowed his audience with an exceptional collection entitled Goth Star.
Having attained a cult following in London's fashion community with his meticulously crafted denim-based demi-couture garments, Sweeney, who has now established a shop and studio in the East End, once again made leather the star of his show.
Tops and belts were festooned with perspex, while prints were individually developed and printed on sweaters, T-shirts and more leather. Cooler than cool military dresses were juxtaposed with Breton stripes, breaches and skirts, as rock n' roll-style satin jumpsuits and jackets also featured.
"It's mainly inspired by teenage angst, rebellion and rock goth queens such as Siouxie Sioux, Joan Jett and Blondie. This is new wave revisited and re-fashioned into posh goth rock," explained Sweeney.
London Fashion Week, which is the seasonal driving force behind Britain's stg£13 billion clothing industry, concludes today ok with shows from Scott Henshall, Justin Oh and Fake London.