Treve ran out a brilliant winner of the Qatar Prix de l'Arc de Triomphe under super-sub Thierry Jarnet.
While the remainder of her rivals were jockeying for position turning for home, the veteran French rider brought the winner wide down the outside to take up the running over two furlongs out and from that point, Treve never looked like being caught.
Sent off at 9/2 with British bookmakers and a little more on the French Pari-Mutuel, her turn of foot saw her come home clear from favourite Orfevre - second again after last year's narrow defeat - and French Derby winner Intello. Kizuna, compatriot of Orfevre, was fourth.
The result meant heartbreak for Frankie Dettori, who in his role as first-choice jockey for owner Sheikh Joann Al Thani, was due to ride Treve until he fractured his ankle in a freak accident at Nottingham last week.
But Dettori's loss opened the door for 46-year-old Jarnet to claim a third victory in the Arc.
Winning trainer Criquette Head-Maarek said: "I want to say thank you to Frankie Dettori as he rode an amazing race on her in the Prix Vermeille. I said to save her for today and he did.
"A big kiss and thank you to Frankie, I am sorry he is not here today.
"She won so well, the way she won was incredible. She got no cover and had to come on the outside the whole way."
Referring to the draw, she said: "When horses are that good numbers make no difference and the ground makes no difference."
She went on: "The jockey said she was travelling so easily he just let her go. I'm so proud for Papa (Alec Head) who bred her and for the Sheikh [Joann Al Thani, the owner]. When he bought her, he said 'I want you win an Arc'. I said 'I cant promise but I'll do my best'."
Asked if it was the highlight of her career, she replied: "Of course. To win with a filly is extra special."
Christophe Soumillon, jockey on the runner-up, hailed the performance of the winner.
"When Treve went past down the outside I thought it would be very difficult for her to maintain that speed all the way to the line, but unfortunately she went even quicker," he said.
"She did something completely unbelievable there. My horse has run straight all the way to the line but he was no match today."Connections of Orfevre hinted that they would like to return for a third crack at the race next year.