They don't lip synch,,at least not the 2 times i've seen it. We were there just last week,and Ariel was a measure or 2 behind for most of the song. then she'd catch up,,then she'd be a measure behind. Maybe she was new? Eric is also real,,they have people in black suits that are very hard to see operating the puppets,,its cool,and i wonder how they do it without tripping over eachother!! its a neat attraction.