Robert De Niro Scolds Jay-Z / Lady Ga-Ga’s Racy Nude Photo is Released

Did Robert De Niro totally school Jay-Z at Leonardo DiCaprio‘s birthday party in New York last weekend?

The New York Post reports that the 69-year-old “Taxi Driver” actor was not pleased when the rapper came over to his table to greet him — because he was mad that Jay-Z had never returned his phone calls. (The full backstory: Jay-Z had allegedly agreed to record a song for the Tribeca Film Festival, which De Niro co-founded in 2002, but never returned phone calls made about the matter.)

“Bob wasn’t in any mood to make polite conversation,” a source who was at the swanky event told the publication. “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.”

Another source confirmed the story, adding that Beyoncé came over to DeNiro and sang to him, but that didn’t calm Bob down.

To his credit, Jay, 42, has been more than just a little busy. He’s just come off an international tour with pal Kanye West as Watch the Throne, and oversaw the opening of Brooklyn’s Barclays Center in October with a week-long performance. In January, he welcomed his first child with Beyoncé.

MEANWHILE in Argentina, Lady Gaga’s tweets were getting a lot of attention ahead of her Buenos Aires concert Friday night.

The Grammy-winning entertainer has more than 30 million followers on Twitter and that’s where she shared a link this week to a short video showing her doing a striptease and fooling around in a bathtub with two other women.

She told her followers that it’s a “surprise for you, almost ready for you to TASTE.”

Then, in between concerts in Brazil and Argentina, she posted a picture Thursday on her Twitter page showing her wallowing in her underwear and impossibly high heels on top of the remains of what appears to be a strawberry shortcake.

“The real CAKE isn’t HAVING what you want, it’s DOING what you want,” she tweeted.

Lady Gaga wore decidedly unglamorous baggy jeans and a blouse outside her Buenos Aires hotel Thursday as three burly bodyguards kept her fans at bay. Another pre-concert media event where she was supposed to be given “guest of honor” status by the city government Friday afternoon was cancelled.

After Argentina, she is scheduled to perform in Santiago, Chile; Lima, Peru; and Asuncion, Paraguay, before taking her “Born This Way Ball” tour to Africa, Europe and North America.