Katherine Heigl takes to the mic in this sneak peek from Jackie & Ryan which is released in select theaters and on demand on Friday!

"I was pretty anxious when I had to get up on stage and there was a crowd of extras there to be a part of the scene," Katherine told ET. "I think I probably turned beet red and my hands were shaking, but then after you do several takes and several angles, I started to feel more and more comfortable."