The singer, 29, who debuted a noticeably skinnier body last year insisted that she lost weight naturally, through a combination of growing up and working out.
When outspoken Handler quizzed Rimes as to why she looks so much thinner than previously, she shot back: "I was a baby! I was fat. I had baby fat. I grew up. I work out. There's nothing else to explain."
It's not the first time Rimes has spoken out on the subject of her weight. As RadarOnline.com previously reported, back in October she told the Associated Press: “You know, I went through all I've gone through in the last few years and I was going through a divorce and I couldn't get out of bed, and so I gained 10 pounds and then I lose 10 pounds because now I'm moving around and I'm working and you know, I don't stop and no one sees that (weight loss) actually can happen like naturally.
“It's a natural progression of life,” she said. “It has to be some big deal and some issue so I'm glad there are people out there that are smarter than that and they don't buy into it.”