The iDOLM@STER Cinderella Girls: Special Program

Honestly there's not much point to watching this, even for IMCG stans. It's mostly a rather dry recap of the first eight (iirc) episodes hosted by New Generations' seiyuu, who also present their favorite scene (the concert with Mika). They don't talk much about making the show or anything. The one bright spot is when Producer's seiyuu joins them, and they do talk a bit with him about making the show. (His favorite scene, incidentally, is Uzuki's first meeting with Producer.) Moreover, he was a high schooler at the time and is pretty adorable actually. So, if you feel a desire to have a little ... behind-the-scenes knowledge of IMCG (and I do mean a little), go ahead and watch, just skip ahead to when Producer's seiyuu appears. Otherwise, you can safely skip it.