Goldikova put up the most stunning display of her career to take the Prix Jacques le Marois at Deauville.
Freddie Head's filly was very reluctant to enter the stalls beforehand but had no worries when the gates opened.
Despite the race drawing a handful of previous Group One winners, Olivier Peslier never had an anxious moment and his mount left the field for dead.
Head employed the winner's regular pacemaker, Only Green, but Goldikova was going so easily at halfway that Peslier decided to dictate matters.
William Haggas' Aqlaam was the only other runner on the bridle at that stage but as soon as Peslier asked the four-year-old to quicken, the race was over as a contest.
Aqlaam put up a tremendous effort, beating the rest clearly, with John Gosden's Virtual running on for third.
French Guineas winner Silver Frost, Godolphin's Gladiatorus and Jean-Claude Rouget's Never On Sunday, all Group One winners in the their own right, were never in the race.
Goldikova was winning her sixth Group One and it is very hard to see what will stop her winning a second Breeders' Cup Mile.
Head said after the stunning six-length success: ‘She has run as fast as she can and it is great - what more can I say? It is unbelievable.
‘My other runner didn't have enough gas to make the pace so she had to come early, but she can do anything. She has never liked the stalls since the beginning, and is a little bit naughty at them, but that is her only bad point.
‘We need to discuss where she goes, but I am favouring bypassing the Moulin and going for the Prix de la Foret. The Breeders' Cup is now in November, so is later this year and it will be hard for her to keep her form.
‘I want to give her a little rest, and the Foret fits in well before the Breeders' Cup. She might make it look easy but she has still had a race.’
Head enjoyed a fantastic partnership with the mighty Miesque in his riding days, but he added: ‘I would say she is better than Miesque as she is better in her head, and Miesque used to pull very hard.
‘Marchand d'Or is very good and is a champion, but she has to be the very best I have trained, she is something else.’
Haggas was delighted with Aqlaam, saying: ‘I am very pleased with him and while I'm not sure how far clear of the third he was, it was certainly a long way (five lengths).
‘He has run another good, solid race and is coming forward all the time. He stayed on really well and is getting better and better, although I've no idea where we will go next.’
Gosden was equally pleased with Virtual.
He said: ‘The winner is the best in the world and to finish third to her is an honour. He is a big horse by Pivotal so he is better on good ground. I will head to the QEII at Ascot now.’