Really. Billy Ray Cyrus more than Bruce Lee, Steven Tyler, Kirk Douglas, Ronald Reagan, Will Smith, Julio iglesias? He had one song. He's hardly the best known of these.
Answer percentages will always be biased in favor of recent people. Bruce and Brandon Lee have both been dead a long time. Steven and Liv Tyler are both still around, but neither has done anything particularly newsworthy in the last couple years. Same with Kirk and Michael Douglas, Julio and Enrique Iglesias. In the case of Ronald Reagan and Patti Davis, the differing last names is going trip up a LOT of people as well. On the other hand, Miley is in the news frequently, and her dad is more known for being her dad at this point than he ever was for his gimmicky song.
It was the first thing that popped into my head as I was typing as fast as I could to have the most time for later in the quiz. I didn't actually type it, but the thought was there.
So I get the Steven Tyler and Joe Jackson (because I don't think I've ever heard them referred to as Steve or Joseph), but there is definitely some room for flexibility. Took me forever to figure out Voight (Voigt, Vogt, Voght) and I was really surprised it didn't accept Allen.
I mean... it's not completely impossible but the fact that he had 13 children claimed to be legitimate plus a string of illegitimate children (all by multiple different women) drastically reduces the chances of that being true.