Earlier in the week, Katy Perry released a teaser for the “Birthday” music video, in which she unveiled five of her new characters. Now we have the payoff: a full video of Katy going all Bad Grandpa, attending real parties as these fake people. The results were cut together for the official video and, frankly, don’t seem so terrible. Sure, some babies cry about bad face paint and pooping animals, but babies cry all the time. The old people seem totally down with her aging stripper character. And the Jewish family appears to embrace her Bar Mitzvah DJ character with open arms. Apparently, it's not anti-Semitic if you spin on the floor like Homer Simpson doing Curly from the Three Stooges. L'Chaim!