In June, Katy Perry spent four straight days under constant video monitoring inside what she called the Witness World Wide Headquarters, live-streaming everything on YouTube for fans to watch. With her Witness world tour currently in full swing, she decided to release a special, feature-length cut of her activity across those four days exclusively on YouTube Red this October 4.

"Everyone will get to witness all of me," Perry says in the trailer. "Not just the glam me. The good, the bad, the ugly." And then she throws up. (Maybe.)

We get a tease of what else to expect, including her album goals, how she wants to evolve as a person, her fears and desires. Numerous celeb guests drop by too, including Mario Lopez, James Corden, Sia, Caitlyn Jenner, Gordon Ramsay, Anna Kendrick and America Ferrera. (And yes, Nugget the pup makes multiple appearances.)

Any fans who missed the 96-hour event this summer will want to check out this special when it drops next week. It's an ambitious move, perhaps creating a new way for artists to engage with the people who love them. And this time, you won't have to spend four whole days watching.

Katy Perry's Witness: The Tour Opening Night Photos

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