A Musical Celebration of Coco takes place in Plaza de la Familia (Paradise Gardens area) throughout the day at Disney California Adventure during the Halloween season. On Friday the show times were not listed anywhere. I walked through the area just before 1:30 and they were preparing for a show so I stopped and watched it. The show is the same as previous years, I did not notice any substantial changes.
Here is a video of the performance:
Here are some cell phone pictures of the show –