Transcript for Disney's 'Frozen' Is An Icy Musical Adventure
The new animated disney movie musical "frozen," just hit theaters. It's about a princess, anna, and looking for her sister, elsa. I had a chance to speak to the superstars of those two sisters. They are two of hollywood's finest. What power do you have to stop this winter? Your powers really are beautiful. Reporter: And they join forces. No, wait. Reporter: To lend star power to disney's latest animated flick, "frozen." ♪ For the first time in forever ♪ Reporter: What you may be surprised to learn is that that voice -- is kristen bell. I can hold a tune. You are very modest. It's hard to take credit wheen you're singing next to idinamenzel. Reporter: And for broadway veteran and tony award winner idina menzel, this role allows her musical talent to shine. You ever do karaoke? When I can. Do you? I have to get really drunk. I'm a dueter. I prefer someone else to take the blame on stage with me. She's my sister. She would never hurt me. Reporter: The pair play sisters. Both strong female characters who aren't so different from the women who play them. Did you get a chance to bond before you started these roles? I wanted to hear us sing together. But kristen took -- "wind beneath my wings." Reporter: And bell is doing other bonding off-screen, with her baby girl. Were there shocking things to parenting? Being a human food truck is interesting. Reporter: Just tied the knot with long-time boyfriend actor dax shepard. And menzel has been married for ten years to actor taye diggs. They have a 4-year-old son together. Where do you go from here? We should work with each other's husbands. Give it a shot. I don't know where it's going to go. Just try it. We might love it. I don't know. That interview turned risque right there. You didn't see the best part. Let's just say that. "Frozen" is in theaters now.
This transcript has been automatically generated and may not be 100% accurate.