Robert De Niro scolds Jay-Z at party, says rapper is 'rude' Robert De Niro and Jay-Z got into a tense beef at Leonardo DiCaprio's birthday bash the other night, when De Niro called the rapper disrespectful, according to the New York Post. Witnesses say "Godfather II" and "Taxi Driver" star De Niro gave Jay-Z a dressing-down in a roomful of celebs including Martin Scorsese because the rap mogul had refused to return De Niro's calls. Sources add that Jay tried to joke his way out of the situation, and even his wife, Beyoncé, tried to intervene, but De Niro wouldn't back down. "Bob was sitting at a table, and when Jay-Z went over to say hello, De Niro told Jay that he never called him back," a source says. "[De Niro] wasn't in any mood to make polite conversation," the source says. He told Jay that if somebody calls you six times, you call them back. It doesn't matter who you are, that is just rude. Click here to read more about the Jay-Z, De Niro scene on The New York Post.