Country's own Carrie Underwood has not only acted in her music videos. She made a cameo last year on the television sitcom 'How I Met Your Mother' -- so it seems the transition to the big screen for the movie 'Soul Surfer' was not that much of a stretch for her.

Underwood plays youth counselor Sarah Hill in 'Soul Surfer,' the true story of teen surfer Bethany Hamilton who had her arm bitten off by a shark while surfing in 2003. Being the new girl on set, the 'Temporary Home' singer tells MTV that her confidence was bolstered by the people she worked with: "I feel really confident that they wouldn't let me do anything I'd look bad doing."

"I think the most challenging aspect of making this movie, for me, is just that I've never done it before," she says. "This is all very new to me. I know how to sing. This is something ... I'm way out of my element."

The movie is five years in the making, and Underwood says that everyone involved with the movie wanted everything as accurate as possible, as this was a true story. Of the very emotional storyline, Underwood says, "Everybody's doing things for the right reasons. I think it's impossible to not be impacted when you're a part of this movie."

Underwood adds that what helped is that the real Sarah Hill was on the set every day to help her stay as close to the character as she could -- including helping Underwood in "trying to say things the way she would say them." The singer also found similarities between herself and the counselor. She explains, "She's really strong and I believe I can get that. We have a lot of things in our personality that are the same."

'Soul Surfer' crashes into theaters on April 8, 2011.

Tune in to MTV's Full 'Soul Surfer' Interview with Carrie Underwood