Rose took to Threads to claim Perry rubbed her exposed crotch on her face during a boozy evening, prompting police to confirm an ongoing investigation into the historical incident.
Perry has strongly denied the accusation, while Rose previously described the night as nothing horrific in a 2011 interview.
The resurfaced claims come as Perry enjoys a high-profile romance with former Canadian Prime Minister Justin Trudeau, with the couple recently spotted at Coachella and a Netflix CEO party alongside Prince Harry and Meghan Markle.
Social media users also dug up a 2014 Conan O’Brien clip where Anna Kendrick recalled Perry’s “aggressive” behaviour, including an incident where Perry stuck her finger into Kendrick’s cleavage, though Kendrick downplayed it.
Friends say Perry was “blindsided” by the resurfacing allegations and faces a tough online backlash despite Trudeau’s feminist stance.
The singer, worth an estimated $400 million, has shifted from pop party-girl to mingling with billionaires and royalty, but this scandal threatens to tarnish her carefully crafted image.
Trudeau’s past controversies around similar accusations add an awkward layer to their relationship amid this fresh scandal.
As Perry’s 2010 hit “The One Who Got Away” climbs back up the charts thanks to TikTok, the singer now confronts a very public challenge that could test her and Trudeau’s high-profile partnership.