Rihanna says she has been loosing weight rapidly because of her hectic work schedule. But the blonde babe says she is now on a mission to get her curves back.

“I’m working on getting [my butt] back,” Rihanna told People magazine. “It used to be my favorite body part, but now it’s disappeared! I’m going to have to start hiking or at least going on the elliptical or walking on an incremental treadmill or horseback riding. Something that firms the butt.”

While exercise may not give her immediate results, Rihanna says she put her dieting regiment on hold and start eating everything to gain some weight.

“Then there’s the old fashioned way. I’m eating everything. I’ve been eating ice cream and fast food and Italian food,” the 24-year-old Bajan pop star said.

Rihanna hosted a birthday party for her grandmother in Brooklyn last weekend, where she tweeted some photos of herself in the kitchen.