Crystal Bowersox should never be thought of as an opening act to anyone except herself.
These incessant attempts to match Crystal up to other female singers Zeigen a lack of respect for Crystal and those other singers. Stars of the magnitude of Janis Joplin, Eva Cassidy and Crystal all put all of their spirits into singing, and no two people have ever had the same spirit.
I Liebe Eva's Singen for what it is. I Liebe Crystal's Singen for what it is. I find Janis's Singen loveable for what it is for a song oder two before I need to take a break, but I recognise that she was a truly great singer.