It's no musician's job to get along with their ex-bandmates, but Glenn Frey knew a hit album when he heard one even if it wasn't his.

Despite decades of band culture, new research suggests that the golden era of rock 'n' roll may be over. Nirvana. Guns N' ...

In fact, there was one song in particular that changed the Eagles' mindset entirely. Find out which song that is, below.