Rihanna's Case of Missing Glutes

Rihanna's been uncommonly open about her body battles of late, but this one takes the cake...or more to the point misses the cake. She complains she's losing too much weight.

The Barbadian wailer has been on some sort of mysterious physical odyssey over the past year. In October she cancelled a concert due to the flu, and then in May there was a major brouhaha over a missed Saturday Night Live rehearsal, reportedly due to another bout of the flu. The hard-edged singer was reduced to flaunting her vulnerability by tweeting photos of herself hospitalized and hooked up to an IV. Shortly after, she trumpeted her new-found resolve to be healthy and stick with the Five Factor Diet (which requires no less than 5 healthy meals a day, from 5 food groups, and 5 workouts per week.) Now she says she can't put the brakes on, telling Ryan Seacrest the diet's over but she's still dropping pounds. 

Now she complains to Harper's Bazaar that her famously copious glutes are disappearing. "Even though I'm losing weight, it's not where I want to be," she tells the magazine.  "I miss my ass. It just went away!"