Robert De Niro Argues with Jay-Z in Front of Leonardo DiCaprio's Birthday Party Guests

Lesson for the day: If Robert De Niro calls you about something, you call him back. It doesn't matter how big of a big shot you are. Don't call De Niro back, he will s**t all over you in public. Yes even if you are Jay-Z. De Niro and Jay-Z are neighbors in Tribeca but that didn't stop De Niro from lighting into him at Leonardo DiCaprio's birthday party. All because of some unreturned phone calls.

It went down this way. Jay-Z sauntered up to De Niro's table to say hi, apparently having forgotten about the six phone calls from De Niro about a song Jay-Z was supposed to record for the Tribeca Film Festival. But De Niro...he hadn't forgotten. De Niro NEVER FORGETS. A Page 6 spy described the confrontation. "[De Niro] told Jay that if somebody calls you six times, you call them back. It doesn’t matter who you are, that is just rude."

Jay tried smoothing things over with a joke but Bob wasn't placated. Things got so tense that Beyonce had to step in but even her presence couldn't cool Bob's jets. The Page 6 spy said, "It was the talk of the party. Everyone was saying there’s only one star in New York bigger and badder than Jay-Z, and that’s Robert De Niro. He can be quite scary when he’s angry."

Oh I see what the deal is. De Niro was the king of New York but then Jay-Z came along. So De Niro decides he's going to dress this kid down and show everyone that he's still the boss. Good play De Niro. Now it's Jay-Z's turn. Can you say "scathing diss tracks?" Jay-Z's entire next album will be nothing but songs about what a punk De Niro is. You think Taylor Swift is hard and unforgiving. Try getting under Jay-Z's skin. That guy has more to him than Rosie O'Donnell with PMS. Evidently so does De Niro.