David Foster and Yolanda Hadid ''did their best''.

The 'And When She Danced' singer insists he did all he could to work on his marriage with the 'Real Housewives of Beverly Hills' star.

He told Entertainment Tonight: ''We just always did our best. We had some other issues as well, but everybody's in a good place now. The main thing is that she's healthy and in remission. She worked really hard at it and now she's reaping the rewards of that.''

Meanwhile, Yolanda previously admitted her divorce from David was ''heartbreaking''.

In her new book 'Believe Me: My Battle With the Invisible Disability of Lyme Disease', Yolanda shares the story of her split with David and admits her illness played a part in their divorce.

She explained: ''Of course it was heartbreaking. It's my marriage - it's heartbreaking, but so is life. David and I had a great seven-year run. It became very difficult. The only reason I shared [that story] is because people need to understand that being a sick person is really hard, but being the caretaker of a chronically ill person is hard and people just get to their limit.

''Men want to fix things and if they can't fix it, it's really hard. And absolutely from my part, no bad intent, we all say things that we don't mean. We all say when we get pushed to the end, we all say things that are hurtful, but it's not a big deal. I hold that marriage and that relationship in very high regards. I only wish him love and heal and happiness and I've grown from it. I'm so grateful to be where I am today and if it hadn't been for that, I wouldn't be in New York today and I wouldn't be living the life that is authentic and true to me.''