Watching some of the videos you've posted, Shania comes across as a really nice and well mannered person, no sign of any Diva attitude, or being superior in any way.
I think she might be a bit of a perfectionist, but that is because she is a professional and always wants to give of her best.
On those videos she somehow did'nt look like a celebrity, which is good, she's just came across as an ordinary wife and mother.
Yes she's a huge star, talented, creative and beautiful, but she has kept her feet firmly on the ground.