Australian designer Katie Taylor, who sells her garments under her birth name Katie Perry, sued the "Hot N Cold" singer for trademark infringement in 2019. Last April, Taylor won a case that stated Perry's 2014 Australian tour merchandise breached a trademark that the designer had held since 2008.

Katy Perry has successfully appealed against a trademark decision over her name, against Australian fashion designer Katie Perry.

Pop star Katy Perry successfully overturned a trademark decision barring her from using her own name to sell merchandise in Australia.

Katy Perry has emerged victorious in a long-running legal battle with Australian fashion designer Katie Taylor, who operates under the brand name "Katie Perry." On November 22, a panel of three appeals judges unanimously ruled in favor of the singer,