BUFFALO, N.Y. (AP) — A pep rally skit by three white high school students who wore blackface and parodied Chris Brown's arrest for assaulting Rihanna has officials in a largely white New York district vowing to set clearer expectations for school events. The skit was one of several pop culture parodies performed Friday at Waverly High School as part of an annual "Mr. Waverly" competition, Superintendent Joseph Yelich said. The one in question had a male student portraying Brown standing over another cowering actor playing Rihanna; a third male student played an arresting officer.