The central conceit of the video is that an unrecognizable Perry wreaks havoc at a series of real-life parties, including one man's 90th birthday celebration.
"GUYS, PREPARE YOURSELVES cuz it's time to bring out the big balloons and #MakeItLikeYourBirthday!" the 29-year-old singer tweeted before the video's release.
According to TMZ, some people were genuinely appalled by her appearance at a 5-year-old's party, where she dressed up like a clown and faked a car accident.
Celebrity Breakups and divorces of 2014 [PHOTOS]