| She's probably too close to the mic, and/or it's positioned less than ideally, and/or you still haven't found the right mic.
My guess is you're up against that 'is it 3k? no, i think it's 2k' overloaded hardness that some females produce.
Try a thick dynamic, like an re20 up close, or a thick ribbon, like an r84, about 2 feet out. Try having the mic over her head pointed at her forehead. Try it at chest level pointed at her nose.
Used to be a time when that overload was hyped for impact and drama, thinkin' Aretha here. In these days of squeaky clean, distortion has become the enemy, the art of harnessing it for good is becoming lost.
Pity.
Gregory Scott - ubk
.
__________________
. |------- Creator of The UBK Fatso ---------|
. 
____________________________________
|