The 32-year-old songtress said she had a shared a wonderful relationship with an "amazing" man and has no regrets, reported E! online.
"Marriage is a tough business, and we gave it our best college try. I had a great relationship with an amazing man, so I know what good is. I have a great launching pad for the future. I will never take that for granted," Lambert said.
Lambert and Shelton, 39, were married for more than four years. They have no children together.