Billy Elliot Vlog - "Shine" Backstage Vocal Booth Singers?

I remember several years ago watching a backstage vlog from one of the actors in Billy Elliot, and as part of it they showed three women who sang the backup parts to "Shine" offstage in a vocal booth. They did some bit where the women were chatting and on their phones as they entered the booth up until the last minute where they had to start to sing their parts. Does anyone else remember this, and does anyone have a link? I've searched YouTube and a few different news sites and haven't found it. Thanks!

If I am remembering correctly, Greg Jbara did a video blog for broadway.com and I believe that was in one of the episodes.

Yes, you're correct! Thanks so much. Here's the video in case anyone else is interested. The phones are definitely supposed to be a bit. Thank you again, emmalatifah!!!