Gaga "Telephone" Details

So I don't know if anyone else noticed this...but in Gaga's "Telephone" video there is a girl in it during the scene when she is in jail (before she picks up the phone) who looks exactly like Gaga! I even thought for a second that it was her, but after some research it turns out that the girl is Gaga's sister Natalie Germanotta. If you want to check it out, scroll down to the bottom of this page and watch the video (it's around the 2:37 mark) =)