In general, notes a 7th above the fundamental are slightly out of tune on most instruments. These notes were banned by certain power entities at one time or the other. Modern outlook changed all that. That's why Mick Jagger sounds correct or right, today. Some singers today can't make Jagger sound better than Jagger. He sings quite flat, but it sounds cool. Some singers today overuse this flatness to death. The pitches sound horrid or even wretched, to me.