WHACK MC Robinson, Ludacris

Vanity Fair contributing editor Lisa Robinson might be good on paper, but her freestyle flow is weak. Clearly mismatched, she rapped with hip-hop and film star Chris "Ludacris" Bridges for Wednesday night's Tribeca Talks panel.

Luda, 29, politely played along as Robinson, who appears to be in her mid-50s, asked questions that started with such phrases as "I don't understand all that rap stuff" and "Now, if you're fronting," among other gems. After her use of the word fronting, Bridges and the crowd erupted in laughter, and the amused rapper eventually grinned and asked the elder editor to explain what "fronting is ... for all the people in the audience who may not know."

Later, Robinson's tired comparison of rappers to white rock dinosaurs like David Bowie and members of The Rolling Stones was lost on the youthful audience, who, moments before the panel, were enjoying Ludcaris's hits piped in through the speakers. While a few audience members slept, one was overheard remarking, "What are these questions she's asking?"

Robinson did get Bridges talking about his role as Angry Elf in the upcoming Christmas feature film Fred Claus: "It's my head super imposed on a little person's body, and I'm the DJ at the North Pole radio station. The catch is I only play one song, over and over; 'Here Comes Santa Claus.' Vince Vaughn's character can't stand to hear it anymore, and we eventually get into this big fight. I can't tell you how it ends, but it's funny, man."

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