She let the world in to witness her life behind closed doors for four days during a live streaming event in June.

6月，水果姐凯蒂·佩里（Katy Perry）通过网络直播跟世界分享了她的4天的私人生活。

And Katy Perry turned her fifth album promotional piece into a feature film to debut on YouTube on October 4.

10月4日，水果姐将在油管推出第五张专辑的纪录片。

The 32-year-old singer released a trailer on Wednesday through the video sharing site for her upcoming film, Will You Be My Witness?

32岁的水果姐周三在直播中分享了纪录片的预告链接《Will You Be My Witness》。

The behind-the-scenes special followed the singer nonstop during the 72-hour live stream ahead of the release of her fifth-studio album Witness.

水果姐已经连续做了72小时直播，而后发布了第五张专辑《Witness》和幕后花絮。

'I've just been thinking about what it means to be a witness,' the pop singer said over her song Swish Swish playing in the background. 'All I've been doing is observing and making little stories of my observations.

水果姐放着新歌《Swish Swish》说：“我一直好奇做证人是什么样的。我一直在观察，然后把观察到的结果做成故事。”

'I'm not trying to be private here. Everyone will get to witness all of me, not just the glam me.'

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