Who's the most popular guy in the midst of the worst economic crisis in decades? Why, none other than Nouriel Roubini, New York University's own Dr. Doom. He just got back from a world tour.

Roubini, a doomsaying economist who's as well-known for his Tribeca loft parties as his increasingly grandiose predictions of worldwide economic collapse, took a break from wooing young women on Facebook to post a few photos of a copter ride in Brazil. (He simply had to spring for a helicopter "as Sao Paulo car traffic is THE worst in the world.) Check out who he hung out with: New York Times loan shark Carlos Slim Helù, disaster-exploiting hedge fund manager John Paulson, and demise-of-empire chronicler Niall Ferguson. They know all about meltdowns, too!