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would make a video like this ...

OK, whose kids are these ?  It is hard for me to tell the difference between a NY or New England accent (they both talk funny), but you can clearly see in the video, these are not Florida Girls.

The pic of the sky is dark and gloomy, like winters in NY, and I thought I detected a NY Accent !

Are these "Charlies Kids" ? 

They sort of "favor" Charlie, and obviously are very vocal, so perhaps they are his kids ?