Rihanna Reveals She's 'Not Happy' Being A Size Zero (PHOTOS)

Rihanna wants her bootylicious body back.

The "We Found Love" singer revealed to Us Weekly that her crazy schedule and lack of sleep (which recently landed her in the hospital) has resulted in some weight loss that she's not too thrilled about.

"I'm a size 0 -- and not happy about it!" Rihanna told Us. "I went way too far. I prefer myself a bit chunkier. I want my old butt back!"

Old butt or new butt, RiRi still looks good if you ask us. But, clearly pint size proportions aren't for everyone.

Let's just hope RiRi's desire for a bigger bottom doesn't take her down the path of those crazy butt injections.

Although Rihanna may be mourning the loss of her former curves, she hasn't been shy about exposing her newly slimmed down silhouette via Twitter and Instagram -- insuring that her self-esteem is well intact.

Plus trying to gain weight is tons more fun than losing it -- so we're sure RiRi will be back to bootylicious form in no time.

Here's a look at RiRi's smokin' hot figure on a recent vacation to Hawaii. Do you think she needs a little more meat on her bones?