Here's a good excuse to watch it again!
Turns out Lady GaGa's 17-year-old sister Natali Germanotta makes a cameo appearance in the epic that is the "Telephone" video.
Designer Brian Lichtenberg reveals, "When she [Gaga] is on the phone in jail, there's a girl behind her that's in the frame that looks a lot like Gaga. That's her sister."
Check it out around the 2:37 mark!