Nicely sung, I like her voice, but that overt slap bass sound is not for me, too little tone. That is not saying that she is not doing it well. But be it on acoustic or electric bass, a bass can quickly sound too percussive for me (be it Lee Rocker or Larry Graham), I'm more the long notes/cello tone guy.
Francesca's bass playing has become much more percussive over time, it's part of her development as a player and no doubt owed to the fact that the two play without a drummer. In Elvis' Fever version the bass is relieved of percussive duties due to the finger snapping and occasional drum breaks/rolls.
