Katie Perry, a clothing designer who used her own name as the name of her brand, has won a 15-year court battle against pop superstar Katy Perry. The case, which began when Katie Perry, who now goes by Katie Taylor, was settled after 15 years of court proceedings. The Australian High Court ruled this week that Taylor can use the Kaite Perry brand and that it did not violate trademark laws. However, the case may not be resolved, with the High Court deciding that Taylor's trademark can remain on the register.