American pop star Katy Perry reignites her court feud with Aussie mum Katie Perry and appeals claims she infringed on Sydney woman's trademark

American pop star Katy Perry will appeal a decision made in an Australian court which found she infringed on a Sydney designer’s trademark.

In April, Katie Jane Taylor, a self-described ‘Aussie battler’, sued the I Kissed A Girl hitmaker, 38, for trademark infringement in Federal Court over the sale of clothes.

Taylor, a mother of two, has operated a clothing label under her birth name Katie Perry since 2006 and has held the trademark in Australia for more than a decade.

The Sydney designer sued the singer – whose real name is Katheryn Elizabeth Hudson – claiming she infringed her trademark by using one that was ‘substantially identical to or deceptively similar’.

Ms Taylor claimed Perry was using the trademark in Australia since at least 2013, selling products not only at her concerts, but also at shops such as Myer and Target.

Justice Brigitte Markovic released her judgment following the lengthy trademark dispute in April, saying it was a ‘tale of two women, two teenage dreams and one name’.

Ms Taylor partially won her claims while a counterclaim by Perry and her company Killer Queen LLC was dismissed.

Ms Taylor began designing clothes in November 2007 when she launched her line at a school charity event and then sold them at Sydney markets in May 2008.

In April, Katie Jane Taylor (pictured), a self-described ‘Aussie battler’, sued the I Kissed A Girl hitmaker for trademark infringement in Federal Court over the sale of clothes

Taylor, a mother of two, has operated a clothing label under her birth name Katie Perry since 2006 and has held the trademark in Australia for more than a decade

She had already registered her business and domain name as ‘Katie Perry’ in 2007 before the pop idol of the same name released her own merch Down Under.

In 2009, Ms Taylor went public with her legal battle in the form of a video message to the superstar on YouTube.

This prompted an email from Perry’s manager Steven Jensen who said the situation was ‘blown way out of proportion’.

However, the Sydney designer sued the singer – whose real name is Katheryn Elizabeth Hudson – claiming she infringed her trademark by using one that was ‘substantially identical to or deceptively similar’

Perry has since filed an appeal on the Federal Court’s ruling with the next hearing date yet to be decided.

Despite the backlash Ms Taylor has received from Perry’s fans, a network of Aussie support has kept her spirits high during the legal battle.

Even The Bachelor star Thomas Malucelli threw his support into the ring, modelling the small business owner’s clothing range and leaving sweet comments on her Instagram page.

‘You rock, my friend,’ he wrote under the post celebrating her initial court win against Perry.