i just know that. >> shania twain and gary sinise are kj's parents. >> will she get better?'re only 20 years old. you just met this girl. >> i want you to know that whatever this is, whether it takes us, i'm with you. >> kj, who's in an indie band, also sings in the film, including the hit song believe." ♪ >> the real jeremy camp, who has 32 number one singles, is an executive producer on the film and was very impressed with the 22-year-old "riverdale" star. >> meeting for the first time was like, you're -- it's almost like my older self-telling my >> that's what i feel like, because he's my age when that all happened. >> kj's the kind of guy who walks on to set, he knows everybody's name. he will hug every single person. >> what if this is my destiny? >> stop it, you're the strong one, not me. >> if one person's life is changed by what i go through, it'll all be worth it. ♪ i still believe >> they have worked together before in a dog's purpose. of m talks to you. before in a dog's purpose. of m talks to you. >> i don't think, i know we were scrapers. yeah... our dishes neve