Just to clarify, I haven't spoken with her since she was little, though I'm sure we were both at the same funeral about 12 years ago but I don't remember any interaction.
When we used to go to her grandpa's house her mama used to always say, "Sing, Jennifer!" So she was "performing" even as a litle girl. My mother-in-law has seen her more frequently as well as her other great aunt and uncle who live in NYC where Jennifer has an apartment.
I hate to say too much because she's pretty publicity shy when it comes to her personal life but I can certainly concur that she is quite talented. (And she had a pretty good ear for picking a duet partner.)