The 28-year-old had been criticised for looking scarily skinny after posting pictures of herself in her swimsuit on her honeymoon last month.
And now LeAnn has posted another picture on the social networking website of her super slim bikini body.
But she insists she is healthy and just watches what she eats and exercises regularly.
On Friday, in response to a fan, she wrote: 'I just eat a balanced diet and watch how much 'c***' I put in my body.
'I did have mac and cheese this morning and enjoyed every bite! Gotta have those days.'
She later tweeted: 'I work out 3 days a week if I'm lucky. I'm constantly on the move and my workouts are intense.'