No, Madonna isn't being arrested for making insufferable music, so don't make a big megillah. It's just a fun night out for "Esther," Queen of Pop.
That's Madge dressed as a 1920s flapper, with hubby Guy Ritchie as a Dragnet era cop. The getups were part a Purim celebration at the Kabbalah Center in Los Angeles. Purim is a holiday that celebrates the delivery of the Jews from Haman's (boo!) plot to get them all.
Besides the masquerade, the holiday also involves making charitable donations to the poor and eating extremely dry triangular-shaped danish, called hamentashn.