Pop star Katy Perry has lost, for the second time, her years-long trademark case against an Australian fashion brand called Katie Perry.

In a High Court ruling on Wednesday, judges found that designer Katie Taylor had not hurt the US singer's reputation or caused confusion with her clothing brand, which started in 2007.

Taylor, who changed her surname in 2015, successfully sued Perry two years ago for selling merchandise during a 2014 Australian tour, but the ruling was overturned in 2024 with the designer's trademark cancelled.

The new decision found that Perry's reputation was so well-established in Australia that anyone seeing Taylor's clothing brand would not confuse the two names.

"This has been an incredibly long and difficult journey," Taylor said in a statement shortly after the decision.