Led Zeppelin's success didn't come without some controversy, as the band found themselves in hot water thanks to plagiarism lawsuits.

Jimmy Page was already a great guitarist prior to Led Zeppelin, but it was this song that kicked everything into high gear ...

The full trailer for the upcoming IMAX documentary Becoming Led Zeppelin has been released – check it out below.

Some of the greatest rock songs ever are pretty much a pilfered patchwork of riffs, melodies and ideas, but it is a fine line ...