Australian designer Katie Perry has won her High Court appeal against pop megastar Katy Perry in a years-long trademark case.

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

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

The Sydney-based designer had always dreamed of starting her own clothing brand. But she never imagined a global pop star would be her biggest obstacle.

Katy Perry, the American singer who was born Katheryn Elizabeth Hudson, was skyrocketing to international fame following the launch of her popular singles “I Kissed a Girl” and “Hot N Cold,” which were topping Australian and global charts in 2008.

Ahead of Perry’s first Australian tour in 2009, her lawyers sent Taylor a letter demanding she withdraw her trademark application, which she had registered months prior.

“I remember, bursting into tears and thinking, what is this all about? I haven’t done anything wrong,” Taylor said.

The case centers around the sale of clothes under the Katie Perry brand in Australia and the sale of Katy Perry-branded merchandise during the singer’s tour.

In 2007, Taylor, who went under her maiden name at the time, registered her business name, Katie Perry, and applied for a trademark.