Emma Franklin's version (the original) of "Piece of My Heart just came on, and with apologies to Joplin fans, but it blows away the more popular cover. But then again, I feel the same way about the aforementioned "Tainted Love" being superior to the 80s cover. A few other songs have come on, and in every case, the original was better.
The lesson? It's cool to cover old RnB, but don't ever expect to outdo it.