Pop superstar Ke$ha will appear on an upcoming episode of the Nickelodeon sitcom, "Victorious," according to an announcement from the show's producers.  The singer will reportedly portray herself in the episode, and the cast will participate in a contest to win a persoanl concert with her.  Ke$ha's latest single, "Bow," will be the featured song for the show.  Titled "Ice Cream for Ke$ha," the episode is sceduled to air April 22nd.