Question: It was this day in Rock History in 1970, these guys started a three-week run at No.1, the group’s only chart topper. Who was it and what was the song?

Answer: It was The Guess Who with ‘American Woman’. The song was born by accident when guitarist Randy Bachman was playing a heavy riff on stage after he had broken a string, the other members joined in on the jam. A fan in the audience who had recorded the gig on tape presented it to the group after the show and they developed it into a full song.