Katy Perry goes full-on Celebrity Big Brother in star-studded YouTube special

Katy Perry wants her fans and celebrity friends to Witness her life. The pop star surprised fans with a four-day-long livestream in June on YouTube ahead of her latest album, Witness, but now the making of that livestream is becoming a feature-length special for YouTube Red.

Called Katy Perry: Will You Be My Witness?, the Big Brother-esque spotlight will repackage the big moments from Perry's internet event, wherein she holed herself up in a giant house with celebrity guests like RuPaul, America Ferrera, Caitlyn Jenner, and Anna Kendrick coming in and out.

As shown in the trailer, the "Swish Swish" and "Bon Appetit" singer promises to show the world "the good, the bad, and the ugly" of her life as she does yoga with Modern Family's Jesse Tyler Ferguson and discusses politics with activists. "I cannot be free until you are free," Ferrera says.

Other faces popping up to discuss topics like gender, spirituality, and diversity are Mario Lopez, Dita Von Teese, Gordon Ramsay, James Corden, Sia, and "fans, friends, and family."

Katy Perry: Will You Be My Witness? will premiere on YouTube Red this Oct. 4.

Perry kicked off her Witness: The Tour this month in Montreal, where she dazzled the audience with sequins and bodysuits. She continues to offer behind-the-scenes peeks of herself on the road to Xfinity X1 customers.

Watch the trailer for her YouTube special above.