It cracks me up when people say "it is disrespectful to make the song their own." For one every song that is sung is someone's own. Not everyone has the range for this song as it has a lot of ups and downs in tone and pitch. The best version I have ever heard of the song has been was from Whitney Houston back in 1990. If she did it as a conventional song it would not have been as special.
It is a hard song to sing (ask Carl Lewis
). And Jimmy Kimmel proved that the average person likely does not even know the words to the song. Heck we have people that crack in officiating when they have a couple of thousand watching them, there was millions watching this. I am sure it was a little overwhelming.
Peace