I've heard Jennifer's version on You Tube or someting like that. It was good, but I'm going out on a limb and say that Lakisha is a better singer.
I remember Jennifer on AI. For me, there is something missing when Jennifer performs - and sings. She fell flat for me.
Maybe I'll change my opinion when I see Dream Girls, but until then, Lakisha has it over Jennifer both vocally and from a performance perspective.
And still, Fantasia does it for me over both of 'em.