Maybe she just pretended she was Christian at first because it helped make her famous in the first place.
And she's switched from a Baptist to a non-denom church. This is all a carefully planned strategy to move her more into the pop world and movies & TV. It's just rank cynicism.
I think in the C&W world, everyone says they’re Christian whether they are in reality or not because it’s expected in the atmosphere of Southern culture. How many C&W stars are openly atheist or Muslim?