Whole Lotta Love? Layla? Enter Sandman?
Good men have nearly come to blows arguing about it in pubs across the land and now is your chance to have a say in the final round of the
Greatest Guitar Riff Of All Time
Here's where to look for it on the Music Radar site:
They've got it down to 15 choices so make your choice and make it count!
Remember: only you can stop Smoke On The Water.