The 42-year-old singer gave birth to twins Nelson and Eddy five months ago and said that although she wasn't too bothered about losing the weight, it happened anyway.
She told Canada's Etalk, 'You get busy with twins and you feed them so they help you to recover very fast. So I helped them help me.
'But it's not important. I'm not a model. I'm not there to wear a size 2 or 0 or 4. I'm going to find the dress that's going to fit the body at the time. But it happened to be that the weight loss happened very rapidly. And genetically, I'm very lucky too.'
Talking about her home life with husband René Angelil, 69, their twins and son Rene Charles, 10, she added, 'There's a lot to do and lots of fun.
'RC's in a baseball league and there was a ceremony and he said, 'Papa, do you think it's possible for Eminem to come and sing the national anthem. And Rene looked at him and says, 'Oh my god. You can tell this kid has travelled around the world....No, we can't get Eminem to sing the national anthem'.'