The 'Last Friday Night' singer announced during an appearance on The Ellen DeGeneres Show that she will headline a special show on November 23 in honour of Thanksgiving.
Perry said: "I am giving thanks to all of my fans. This is my big announcement on Ellen that no-one has heard about or knows about.
"I played 121 shows up in to the 23rd date [of November], and I want to finish it off by renting out Staples myself and giving a free concert to anyone in the world that wants to come to the 'California Dreams Tour' as my last show."
Ticket information is expected to be released in the coming days.
Perry has toured all over the world in support of her California Dreams album, including stops in Switzerland, the UK and upcoming shows in New York and Oakland.
The singer has scored seven People's Choice Award nominations, including a nod for voicing Smurfette in The Smurfs.
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Watch Katy Perry's 'Last Friday Night (T.G.I.F.)' music video below: