America's Got Talent's Christina & Ali

Photo by Trae Patton/NBC

We are always suckers for a sister act, so when we met Christina & Ali, finalists on America's Got Talent, our hearts melted.

The very young, but very poised, Christina (age 14) and Ali (age 20) Christensen grew up in Idaho Falls. Both girls and two other siblings were diagnosed with the genetic lung disease Cystic Fibrosis at an early age, and turned to song to find comfort. At first they sang separately, but then came together last year to sing Miley Cyrus' "The Climb" at their sister's funeral.

Now they support each other in going after their dreams. In a recent interview with the duo, Ali said of her sister, "I just think it's so nice to have her here as my support. We lean on each other, and it's so important to have a good relationship. So that when I get nervous she's there to comfort me, or when she gets nervous I'm there to give her a pep talk."

Christina added, "I would hate to be onstage alone. That would scare me half to death. So I'm really glad that she's there by my side so we can get through it together."

Though Christina & Ali are not favored to make the final four, what they lack in polish they make-up for in heart. Ali commented, "Our goal is to inspire people. It would be amazing to win this, but we've achieved our dreams so far. We've achieved our goal, which was just touching people's lives."

The girls divulge that they are just trying to send a message. Ali summed it up saying, "It's important for people to understand that if they have struggles or a disability to just do what you love. Find your strength and you can do anything you set your mind to."

Whether they take home the grand prize or not, Christina and Ali have won a lot of hearts.

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For other America's Got Talent stories check out:
Jeremy VanSchoonhoven Has a Dangerous Talent
America's Got Talent Returns for Season 6