Every day marks another milestone in music history, and today, an all-time country classic is celebrating a birthday.

When Johnny Cash recorded “I Walk The Line”, he was two years into his marriage to his first wife, Vivian Liberto. He was also quickly becoming famous, thanks to two early hits, with “Cry! Cry! Cry!” ...

Add Yahoo as a preferred source to see more of our stories on Google. Johnny Cash's "I Walk The Line" has been voted No. 2 on Rolling Stone's list of the 200 Greatest Country Songs of All Time.

Dylan and Johnny Cash famously duetted in 1969. As it turns out, that collaboration was forged out of a reverence from Dylan towards the country hero. One Cash song in particular caught Dylan’s ears, ...