I realised that i have 9 different versions of Smoke on the Water, but none of them are technically covers. There is the original studio version and 4 different Deep Purple Live versions, 3 Ritchie Blackmore/Rainbow ones, and Ian Paice's Sunflower Jam. However, there are several more vocalists: Ian Gillan, David Coverdale, Ronnie James Dio, Graham Bonnet, and Ronnie Romero coming out to Montreux along the way. I once used this as a playlist for a marathon rowing session. It worked quite well.