Before a monster of a thunderstorm forced Lollapalooza organizers to evacuate Grant Park, Fuse's Yasmine Richard caught up with left-field chart-toppers fun. and learned the "We Are Young" trio have been ignoring doctors' orders to take it easy.

"Nate [Ruess, lead singer] and I had two doctors on two continents tell us that we had to relax," guitarist Jack Antonoff admits. "They offered yoga, meditation or tai chi. I meditated for two days, I don't know if Nate did…"

"No," Ruess says, smiling and shaking his head. "I was told to do a lot of things that I didn't do."

And although drummer Andrew Dost might not suffer from any exhaustion issues, he does reveal another more deep-seated problem: "I need a big time attitude adjustment. Because I'm a real jerk."

Watch the video above to find out why fun. feel "more comfortable than ever" now that they're famous, check out the video below to hear the band dissect their "Some Nights" video, and see our photos of the best moments from Lolla, including mud-splattered shots from rain-soaked fest grounds.