MUMBAI: Singer, Miranda Lambert, finds marriage a tough business, and said she and Blake Shelton gave it their "best college try".

The 32-year-old country star talked about their break-up in an interview with Cosmopolitan, reports eonline.com.

"Marriage is a tough business, and we gave it our best college try," she said.

"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," she added.

Lambert and Shelton, 39, were married for more than four years. They have no children together.

Shelton, who had first spoken in the press about the divorce in September, has since gone on to date his ‘The Voice’ co-star Gwen Stefani, 46, who filed her own papers to end her marriage to husband Gavin Rossdale, father of their three sons, in August this year.