8. Johnny Cash and June Carter Cash, 1986–2003
The singer-songwriter was married to June Carter Cash for 17 years and the couple had one child together. Sadly, she died in 2003, but not before Johnny Cash wrote a love letter to her on her 65th birthday.
“You still fascinate and inspire me,” he wrote. “You influence me for the better. You’re the object of my desire, the #1 Earthly reason for my existence.”