One of my favorite parts is the line in the song that goes "you're low-fat, well I'm working on that" and Marissa sings "fat fat fat". :)
I have been trying for a while to get this on video and I still wish I had a better example of how Marissa sings with her music. Just last night we were singing, err, I mean she and that crazy, no-talent, bad singing weird lady were singing, and Jeremy was upstairs working on something. Of course I didn't have the camera on and she was singing her heart out to this same song. I would hear a little chuckle from Jeremy every now and then. She just clams up and gets really distracted when the camera comes out.
In fact, here is the video I shot before that first one and you can see what I am talking about. I know this is not a unique problem but I just wish I could catch it on video better.