Katy Perry sparked major nostalgia among fans by rewearing a 17-year-old stage outfit while continuing her philanthropic efforts in support of a meaningful cause.

The 41-year-old American singer-songwriter recently launched a 21-day charity sweepstakes centered around archival costumes from her early career, with proceeds benefiting the Firework Foundation. Perry co-founded the nonprofit with her sister, Angela Lerche, in 2018 to expand access to arts education for underserved youth.

On Tuesday, June 30, Perry thrilled fans at Cardiff Castle in Wales by rewearing a red-and-white polka dot bra top and matching skirt she first wore during her July 7, 2009, performance at the Capital Summertime Ball.

Soon after taking the stage, the Dark Horse hitmaker took her Instagram handle to share a lengthy carousel featuring concert snapshots alongside then-and-now images of the vintage look, highlighting its return more than 17 years later.

“Learned a wee bit of Welsh. Good to see you again Cardiff and rydw i’n llwglyd ac hoffwn gael cebab,” she captioned the post.

According to fundraising platform Fandiem, the nostalgic polka dot ensemble is expected to raise around $1,000 through the charity campaign. Perry has also revived several other archival costumes during her European shows, including three outfits from her 2009 Hello Katy Tour.

The pop sensation plans to continue showcasing archival stage outfits throughout the remaining European dates of her Out of Office Tour.

Inside Katy Perry's love life

On the personal front, Katy Perry's romance with former Canadian Prime Minister Justin Trudeau continues to blossom. The pair have made several public appearances together after first being romantically linked in July 2025, when they were spotted late at night in Montreal, Canada. They later made their relationship Instagram official on December 6 that year.