Katy Perry: Part of Me (advertised as Katy Perry: Part of Me 3D) is a 2012 American 3D autobiographical documentary concert film about Katy Perry. It was directed by Dan Cutforth and Jane Lipsitz and released in the United States, Canada, the UK and Ireland on July 5, 2012. The film follows Perry through her California Dreams Tour while providing an insight into the singer's journey through stardom and detailing various aspects of her professional and personal life. It is interspersed with various moments of emotional weight and deep significance to Perry.

Produced on a budget of $13.2 million, the film has grossed nearly $33 million worldwide, making it the second highest grossing music concert film ever by a female artist, while ranking fifth overall. Part of Me currently sits as the eleventh highest grossing documentary in U.S box-office history. It received positive reviews for successfully conveying an effective understanding of Perry as an individual, while also garnering praise for her willingness to allow audiences an up-close appreciation of her personal life.