This is heard alone in the intro and outro but also throughout the song.
[ Tab from: http://www.guitaretab.com/l/lady-gaga/216772.html ]
e|-8-6-4---1~---4--13-11-10--------------|
b|-------4---4-------------11----8-9-----|
g|----------------------------10---------|
d|---------------------------------------|
a|---------------------------------------|
e|---------------------------------------|
Note: I know this is not exact, but this is my way of playing it. If you play it along
the track it sounds good.