A couple of years ago BBC news caught up with Led Zeppelin's Jimmy Page about one of their most iconic songs, Stairway to Heaven.
Page talked about how the track was written 43 years after it was released.
"The idea of Stairway to have a piece of music, a composition whereby it would just keep unfolding into more layers and more moods." Page said.
The lasting quality of this music over all these years is the fact that everyone is playing so honestly and with such conviction it sort of shows.
Stairway to Heaven was one of the most iconic rock songs of the 1970's and is still a huge hit today.