If you've going to make an Oscar-nominated, critically heralded movie musical based on theatrical powerhouse "Les Miserables," you'd better do it right. And this bonus feature from the soon-to-be-released DVD for "Les Mis" shows that its actors — Russell Crowe, Hugh Jackman, Eddie Redmayne, and so on — didn't just show up to set and sing. No sir, as true-to-form vocalists, the actors (who sang live to camera, if you weren't aware from the five billion comments they made about it in the press) went through warm-ups.

And if you don't know anything about vocal warm-ups, you should really watch this video. Because Samantha Barks basically meows like a cat at an ear drum-shattering decibel, but you know what? It works. It so works. In fact, if you think being a movie star isn't hard work, just you watch Sacha Baron Cohen and Helena Bonham Carter do off-camera trills. Watch and learn, friends.

And then howl...from your diaphragm.