Let us not forget this list was made by one person or group of people... perhaps if you have a problem with it you should try creating your own and posting it in this thread....
The list is not shady, it just points out where each artists influence came from. It does not matter who is above who unless it is from the same tree line.
This list is a mess, it makes no sense. Why would Shakira be at the bottom, when she's been around longer than alot of these people? Why is Janet below Madonna? Why is Carrie Underwood below Kelly Clarkson?