"I entered this partnership with so much excitement to spend a lifetime with my best friend, and it now fills me with deep sadness to see the dissolution of our marriage," writes Heidi Newfield in a statement announcing that she has filed for divorce from husband of seven years, Bill Johnson.

Heidi insists that she will never publicly reveal the cause of her marriage's demise, nor will she turn this divorce into a "reality show"-type spectacle. But the 'Johnny and June' singer wants to assure her friends, her fans and herself that she fought hard to make the marriage work.

"I can look myself in the mirror, put my hand on a Bible, or even talk to our mothers up in heaven and feel like I really tried," she says. "I gave it my best. Now, my best is best served by being true to myself."

Heidi and Bill, an NFL agent, wed in June of 2004 on a Florida beach. The two met at a corporate fundraiser while she was still a member of the trio Trick Pony, best known for their infectious hit, 'Pour Me.' The blond beauty went solo in late 2006 with encouragement from her husband. It was a lucrative move, as she received five ACM nominations in 2009 -- the most of any artist -- on the strength of her critically-acclaimed solo album.

It was just a year ago that Heidi told The Boot that one of her biggest wishes in life is for "eternal romance." "We all know that when you get married you have your ebb and your flow," she said, "so I wish for that romantic passion to be ever-present."

In the wake of her separation, Heidi certainly hasn't become a naysayer when it comes to romance. She insists that she still believes in true love and in the institution of marriage. She also notes that these tough times could eventually translate into some great music.

"They say the best songs come out of heart break," she says. "Well, if that's true, my best is damn sure yet to come."

Watch Heidi's 'Stay Up Late' Video