Katy Perry serves as both the main star and producer in her first ever concert film, a genre that has stepped up from arty festivals and one-off theatre showings since Justin Bieber's Never Say Never proved that money can be made from a worldwide mainstream release last year.
The documentary follows the pop starlet around the world for her 124-date California Dreams tour in a year that delivers professionals highs and personal lows. Perry invested heavily into the project financially, which explains why she felt it was important to give an honest portrayal.
The film is cleverly constructed around 3D performances from Katy's tour, while an off-stage backstory from her life reinforces the narrative of each song. As such, each track is set up like a chapter of the star's life, which Perry herself describes at one point as being like a "fairytale".
It starts with 'Teenage Dream' chronicling Perry's heavily-reported Christian upbringing and the star's rebellion to become a mainstream popstar, while 'I Kissed A Girl' tells the story of Katy's chart breakthrough after label-hopping from Island Def Jam to Columbia and on to Capitol.
It's a classic rags-to-riches tale that is both endearing and fascinating.
However, it's the star's latter hits that soundtrack the more highly-publicised parts of her life - including her marriage and divorce with Russell Brand. It's the traditional scenario of an independent woman trying to balance a career and a relationship, except this isn't a soppy rom-com with a predictable happy ending; it's real life.
A rendition of 'Not Like The Movies' poignantly acts as a backdrop to her marriage breakdown. Tears, exhaustion and her friends and family's concern adds heartbreakingly raw drama, but satisfies the modern obsession with voyeurism that keeps millions hooked on shows like Keeping Up with the Kardashians.
Nevertheless, the pressures of being an international superstar are powerfully highlighted when Katy puts on a smile for a set in Brazil, despite cracking up from depression seconds earlier. It's a stark reminder that behind the make-up, pyrotechnics and flamboyant costumes is a woman dealing with a personal blow.
Performances lifted from the California Dreams tour are beautifully and impressively shot. Moments of slow-motion action emphasise the surreality and epic nature of headlining an arena, while the 3D effects emphasise the scale of the show.
The balance between the on-stage spectacle and the off-stage ups and downs is nicely judged, while sharp editing helps to keep the pathos of Katy's lifestyle at an accurate speed. Whether you are a fan of Katy Perry's music or not, Part of Me 3D offers a captivating glimpse into a superstar's life with fun and heart-rending honesty, that rarely feels contrived.