AceShowbiz - Katy Perry is raising funds for musicians in crisis by selling her own special festival tickets.

The superstar is due to play at the KAABOO Del Mar festival in San Diego, California on September 16, and has teamed up with officials at the U.S. Recording Academy's charity MusiCares to sell an exclusive Katy Cares pass that lets fans in just to see her.

🎵San Diego, I’m coming with a larger than life show for you! New set, new costumes, MEGA drama! I’ll be there to perform on Sunday, September 16 at 7:30 pm. Get your exclusive Katy Perry Cares pass (benefiting @musicares) to KAABOO for only $89 to see my show! Purchase your pass at www.kaaboodelmar.com/katycares🎵

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A post shared by KATY PERRY (@katyperry) on Aug 20, 2018 at 10:51am PDT

Tickets cost $89 (£70), with a portion of the profits going to the non-profit, which was established in 1989 to help musicians who fall on hard times.

On her Instagram page, the "Firework" singer promised that those who come to see her show will be in for a treat, as the gig will feature a new set, new costumes, and, "MEGA drama!!".