I was a little young and don't remember the first appearances, but I do remember when they performed "Yesterday". My Aunt, who was 17 at the time, had about 20 of her friends over to watch it. We had one of those RCA consoles that had a large external speaker so it played really loud. It had to, with the way they were screaming at the tv. I remember them singing "Act Naturally" and "Help" too.