United Kingdom, April 3 -- Carrie Underwood believes "faith" is the "only" way to stay grounded.

The Before He Cheats hitmaker - who has sons Isaiah, 11, and Jacob, seven, with husband Mike Fisher - thinks it is easy to get swept away by the "self-serving" entertainment business but her Christian beliefs help to remind her about what matters.

She told Fox News Digital: "Faith is the thing that can keep you grounded. When you're in the entertainment industry, there's a lot of things that, and I've said this before, it's just not real life. You can get caught up in a lot.

"You're kind of in a self-serving business. Everybody around you is there to make sure you're good, and you're happy, and you have everything you need, and I feel like ...