Ranked #1 on Classic Rocks "Ten of the Best songs ever" list, this song by a legendary British band is the most requested song on US FM Radio. That was despite the fact that the song was never released as a single in the US. Which is the song?

'Stairway to Heaven' by Led Zeppelin topped Classic Rock magazine's list of greatest songs despite never being released as a commercial single in the United States. The song's enduring popularity on FM radio and its reputation as one of rock's most epic compositions made it the most requested track. Its intricate build from acoustic folk to hard rock anthem showcases Led Zeppelin's musical mastery.