Bernie Leadon is proud of his history with the Eagles. On Jan. 22, the founding guitarist of the legendary rock band posted to Instagram after the band hit a historic milestone.

The milestone made it the best-selling album of all time ...

Their Greatest Hits 1971–1975 by the Eagles becomes the first album to reach four-times diamond status after shifting 40 ...

I had the beginning of it, but not the body of the song, so, in London, they helped me finish it real quick and it turned out ...