<Tr> <Td_colspan="2"> Samples of the three song sections <Ul> <Li> file </Li> <Li> help </Li> </Ul> </Td> </Tr> <Ul> <Li> file </Li> <Li> help </Li> </Ul> <P> "Stairway to Heaven" is a song by the English rock band Led Zeppelin, released in late 1971 . It was composed by guitarist Jimmy Page and vocalist Robert Plant for the band's untitled fourth studio album (often called Led Zeppelin IV). It is often referred to as one of the greatest rock songs of all time . </P> <P> The song has three sections, each one progressively increasing in tempo and volume . The song begins in a slow tempo with acoustic instruments (guitar and recorders) before introducing electric instruments . The final section is an uptempo hard rock arrangement highlighted by Page's intricate guitar solo accompanying Plant's vocals that end with the plaintive a cappella line: "And she's buying a stairway to heaven ." </P>

Who sang the original version of stairway to heaven