Um Dia às Avessas

As I watched this movie, questions similar to the comments others have already posted ran through my head. It was odd to see the brother and sister for example, waking up in the same bed (their parents bed) and the parents in the children's' bunk beds. Other than that, I wouldn't take the movie too seriously, after all it was a comedy (somewhat). Pauly Shore didn't behave as ridiculously as he has in other movies, which was good. He didn't over do the acting as I was expecting, and the same for the children. The children did a great job in my point of view. Children do overact, as in the many children shows on t.v. I wondered though, who's voice sang the songs. My grand daughter and I thought maybe it was Celina Gomez? I could not find any information on that. Does anyone know?