The Eagles' chart-topping and Grammy-winning single Heartache Tonight (released September 18, 1979) was co-written by Don Henley, Glenn Frey, Bob Seger and J.D. Souther. A year before Heartache's release, Souther--and an uncredited Freddie Mercury--sang background vocals on Andrew Gold's Never Let Her Slip Away (released 1978). Heartache has the same exact beat/rhythm as Gold's song, and a similar tempo (HT: 113 bpm, NLHSA: 115 bpm). Gold and the Eagles were also label mates on Asylum Records. The verse vocal melody to Never Let Her Slip Away also seems to have inspired Bobby McFerrin's Don't Worry Be Happy.
Heartache Tonight (:02) VS Never Let Her Slip Away (:00)