On November 10, 1979, the Eagles achieved their fifth and final number-one single with 'Heartache Tonight,' a song co-written by the legendary Bob Seger. This achievement marked a significant moment in the band's history, as it was the lead single from their final studio album, 'The Long Run,' released before their disbandment in 1980. The song's success was a testament to the band's enduring popularity and the talent of its members, including founding bassist Randy Meisner and Timothy B. Schmit, who joined after Meisner's departure. The Eagles' journey to the top was not without its milestones. They had already achieved their first number-one album with 'One of These Nights' in 1975, followed by the iconic 'Hotel California' in 1977, and another number-one with 'The Long Run.' Their reunion album, 'Long Road Out of Eden,' also topped the album charts in 2007, over a decade after their reunion. The Eagles' success was a result of their collaboration with various artists, including Bob Seger, who co-wrote 'Heartache Tonight' with Don Henley, Glenn Frey, and JD Souther. Seger's mentorship and input proved invaluable, as Frey looked up to him, and the song's chorus was inspired by Seger's input. 'Heartache Tonight' not only reached the top of the Hot 100 but also earned the band a Grammy for Best Rock Vocal Performance by a Duo or Group, solidifying their place in music history.