In the first movie, Barbie in the Nutcracker, Pragmatic Adaptation turns the "Marie" of the original story into a "Clara" the name of her doll. But this actually works in the new adaptation, since what else is Barbie but a doll? It makes perfect sense for her to be given Marie's doll's name from The Nutcracker, and since The Nutcracker himself is a "doll" of sorts, for him and "Barbie" Clara to end up together segues perfectly into the preexisting storyline of E. T. A. Hoffmann.
Actually, Clara's the name usually given to the lead of the ballet, probably because the backstory's usually excised.
The website for Life in the Dreamhouse describes Skipper as a Camera Fiend who loves making videos, but the actual shorts rarely show her holding a video camera. What if she helps record the Confession Cam segments? That would also explain why she never showed up in a Confession Cam segment until season three...
Regarding Barbie: Life in the Dreamhouse, imagine how a Deliberately Monochrome doll from Willows, Wisconsin would handle developing full-color plastic and hair when moving to a new city. The scene in one of the first shorts where Barbie awakens in full color suggests that she either permanently became colorized, or has to wear colorized makeup 24/7 to fit in.