In the newest issue of Women’s Health, uber-fit rocker Pink admits that she can go from one end of the diet spectrum to another — within a day.

“I go to extremes,” the 30-year-old tells the magazine. “I diet absolutely. It’s gotta be organic, fresh fish, tofu and greens [during the day]. And then I’ll order a pizza at night and drink a bottle of wine!”

But even with the sometimes erratic diet, Pink is in amazing shape thanks to her rigorous tour schedule.

“When I go on tour, the show is so physically demanding that there’s absolutely no way that I could not be in incredible shape,” she says. “I do an hour of cardio a day, I do a thing called [fitness program] P90X, I do yoga, I do a two-hour show. I have to feel good if I’m going to be on the road this long.”