Nabilla Benattia, who denies any wrongdoing, rose to fame last year when she uttered those words in horror after learning that fellow female contestants had not brought shampoo with them on a show.
Firemen were called to a hotel in Boulogne-Billancourt near Paris in the early hours of today after the 22-year-old, who has now become a television commentator known by her first name Nabilla, apparently had a fight with her boyfriend Thomas Vergara, whom she met on reality TV.
Nabilla herself is due to be questioned as part of a probe into "attempted homicide."
According to her initial statement, the couple was assaulted by three people and Vergara was injured when he tried to stop them, another police source said.
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Prosecutors said Nabilla herself called the firemen saying there had been a fight outside the building after "the couple returned by taxi from an evening out."
She said Vergara only realised he was injured when they got to their room, they added.
A police source added that video-surveillance images showed that the two arrived separately and that Vergara seemed well and healthy when he entered the building.
Nabilla's famous expression spawned countless parodies, including one video where she calls a visibly irate Hitler, and inspired several ad campaigns, prompting the curvaceous brunette to have it registered as a trademark.
She had been taking part in the fifth instalment of "The Angels of Reality TV" - a show that groups together candidates and stars of other, previous reality TV shows - when she uttered those words.