Katy Perry is facing more than just heartbreak following her split from Orlando Bloom as she faces major High Court showdown in a matter of months

The pop star, 40, who has reportedly parted ways with her Hollywood actor fiancé, is preparing to defend herself in a high-profile legal battle – a trademark war with Sydney fashion designer Katie Perry – that’s been raging for over a decade.

MailOnline can reveal that the High Court of Australia – the top court in the country – has set a date for 9 September to hear the dispute over the use of the name ‘Katie Perry’ – a label registered by the Australian designer in 2008.

Katie, who was born with the surname Perry but later used the surnames Howell and then Taylor, claims the singer’s decision to put her name on clothing merchandise during her 2014 Australian tour infringed on her fashion label’s trademark and damaged her business.

‘My fashion label has been a dream of mine since I was eleven years old,’ the designer said. ‘And now that dream that I have worked so hard for, since 2006, has been taken away.’

Pop star Katy – who was born Katheryn Hudson and adopted her mother’s maiden name ‘Perry’ professionally – now faces huge upheaval in both her personal and professional lives. 

She is said to have split from Orlando, 48, with whom she has a daughter, Daisy Dove, four.

Sources say the pair have ‘grown apart’ in recent months, with the Lord of the Rings actor notably absent from the singer’s recent public appearances.

The Dark Horse hitmaker thought the legal battle was behind her last year when an appeal court overturned a ruling that found her liable for trademark infringement.

However, in April this year, the designer was granted a final opportunity to plead her case before Australia’s highest court.

Their war dates back to 2009, when lawyers for Katy proposed a coexistence agreement – an offer the designer rejected. The case escalated when she brought the matter to Federal Court in 2019.

In 2023, a judge initially ruled in her favour, finding the singer had infringed on the trademark through the sale of Katy Perry-branded merchandise in Australia. 

But that decision was overturned in 2024, with the court siding with the singer on the grounds that she had already built substantial international recognition under the name before the fashion label was trademarked.

Now, with the High Court agreeing to review the case, it’s shaping up to be a definitive legal test – not just for the pop star, but for celebrity brand rights across the globe.

In its deliberations, the court will need to assess what Katy was actually known for around 2008 – and whether her fame alone, without a specific reputation in fashion or clothing, was enough to outweigh an existing trademark.

These kinds of disputes are not uncommon. Burger King, for example, operates as Hungry Jack’s in Australia because the name ‘Burger King’ was already trademarked by another business when the fast food giant entered the market.

Gregory Pieris, an intellectual property partner at K&L Gates in Melbourne, said there are ‘many instances’ in which someone in Australia has tried to register a name identical to a major international brand.

‘What happens next with Katy Perry and Katie Perry will have a lasting impact on how similar cases play out,’ he told The New York Times earlier this year.

It comes after Katy was seen fighting back tears while on stage in Australia, as she paid tribute to her fans following her split.

The singer was visibly emotional in footage from her last show Down Under, after it was revealed last week that she and Orlando had split after nine years together.

Orlando has been embracing his newly single status with a week of partying across Europe, including a wild weekend at Jeff Bezos and Lauren Sanchez’s wedding, followed by a night out at a star-studded yacht bash in Rome.

The actor appeared to allude to his split from Katy in a cryptic post to Instagram Stories on Monday.

As Katy took to the stage for the final show of her Australian leg of her Lifetimes world tour, she fought back tears as the show came to a close.

In footage posted on X, Katy made a heart with her fingers, before struggling to hold back tears as she spoke to the crowd at the Adelaide Entertainment Centre.

‘Thank you Australia for always being there for me,’ she said.

It came just hours after Orlando shared a series of cryptic Instagram posts, sharing a quote from Gautama Buddha to his seven million followers.

The quote that Bloom reposted read: ‘Each day is a new beginning. What we do today is what matters most.’

He additionally shared a separate slide which had another quote which was titled ‘Daily Encouragement by Daisaku Ikeda.’

It continued, ‘The important thing is to take that first step. Bravely overcoming one small fear gives you the courage to take on the next.’

Last week, it was revealed that Orlando and Katy officially called it quits after dating for nine years.

At the time, a source told Us Weekly: ‘Katy and Orlando have split but are amicable,’ while also adding that the separation has been ‘not contentious’ thus far.

‘Katy is of course upset but is relieved to not have to go through another divorce, as that was the worst time in her life.’

The Teenage Dream hitmaker – who is currently embarking on her Lifetimes Tour – was previously married to Russell Brand from 2010 until their divorce in 2012.

The insider further added that the reported breakup had been ‘a long time coming’ and that their relationship had also been ‘tense for months.’

In the wake of the separation, Bloom whisked himself away to Venice to attend the star-studded nuptials between Jeff Bezos and Lauren Sanchez this past weekend.

The actor was spotted mingling with a number of celebrities, including Kim Kardashian and Sydney Sweeney.

Orlando was also spotted living single life as he headed to another lavish party on Sunday.

He danced the night away following his recent split from former fiancée Katy Perry as a guest on the swanky superyacht alongside 450 other VIPs including likes of Naomi Campbell, Kendall Jenner, Sofia Vergara and Heidi Klum.

Fresh from three days partying at Jeff Bezos and Lauren Sánchez’s Venice wedding extravaganza, Orlando headed on board Ritz-Carlton’s gleaming 794ft Luminara for its inaugural cruise from Rome.

Bloom was also recently spotted cozying up to Leonardo DiCaprio’s girlfriend, Vittoria Ceretti, during a water taxi ride as they headed to the airport following the Amazon founder’s wedding this past weekend.