Katy Perry Live: Witness World Wide was a 4-day YouTube livestream, featuring Katy Perry living in a Big Brother-style house, filmed continuously for the duration of the event. The livestream featured Perry doing activities in the house, including eating, playing with her dogs, and sleeping as well as other moments with celebrity guests including Gordon Ramsay, Sia, Anna Kendrick, and more! Over its 4 day airing, this livestream generated over 49 million views from 190 different countries.