Chris Rock's brother is coming to his defense. In a new interview, Kenny Rock claims that if the comedian knew about Jada Pinkett Smith's battle with Alopecia, he would not have made the joke about her hair at the Oscars. "The joke was funny. It wasn't hilarious funny, but I know that if he knew that she had alopecia ... he wouldn't make a joke about that. But he didn't know," Kenny said.