R&B star RIHANNA is so desperate to tone her legs she's become "obsessed" with gym workouts.The sexy singer confesses she's only recently felt body confident - and it's all down to her rigorous exercise regime.She says, "It wasn't so much losing weight as being fit and toned and healthy. I just didn't feel great."Now I'm working out and trying to eat healthy. That's making me lose weight without even thinking about it. I'm not intentionally trying to get skinny."I work with a trainer. We work on the arms. I don't want manly, muscular arms. We work out my butt because I love my butt. (But) my legs are my main focus. I'm obsessed."
