Katy Perry is already managing to ruffle feathers with her music video for "Birthday" -- and it hasn't even been released as yet.  

The star gave fans a teaser video on Tuesday titled, "World's Worst Birthday Party Entertainers."  It shows Katy dressed incognito as a number of colorful characters.  One is a bar mitzvah entertainer she calls "Yosef Shulem."  



A blogger on Salon.com is calling Katy's character a "hackneyed ethnic stereotype," blasting the singer for donning facial prosthetics, a curly wig and yarmulke. Katy also plays an oversexed elderly Las Vegas dancer, a hillbilly animal trainer and a Valley Girl princess children's face painter.  

The singer tweeted that the video for "Birthday" is "the most insane one [she's] ever done."  It drops in full on Thursday.




Imeh Akpanudosen / 2014 Getty Images