People just love to watch celebrities singing or lip syncing in a car. I think it must add a sense of familiarity to it for us, "Hey, I have a car and I like to sing in it too!". I don't know exactly why we love these videos but we obviously can't get enough of them because this one that Keith Urban posted just 9 hours ago already has almost 10 MILLION views. I think seeing these two together and so happy after all of these years is also something we all love seeing. They really do look very much in love and seem have a great time being playful together.