Do you guys hear that roop... roop... sound every time after taylor says, "loving him was red..."?
Start at 00:52, that is one of the times after taylor says, "loving him was red"
The background singers start going, "re-e-e-e-e-e.... re-e-e-e-e...."
You can hear the, "roop....roop...", just before the, "re-e-e-e-e...re-e-e-e-e" The "roop....roop...." is kind of spacing out the, "re-e-e-e-e...re-e-e-e-e" Try it. LISTEN!

Then you hear just one ROOP! on, 3:26 on 'Red' and 3:34 on 'Red - Original Demo recording' version before she says, "his love is like driving a new maserati....".


Me and my mom kept listening to it and she thinks it's LIKE a washboard, you know..... It is played by rubbing a stick along the notches to produce a ratchet-like sound.

ANSWER:
Can you hear it (both sounds described above)??
what instrument do you think it is?


Just hit play on your player, close your eyes and listen. you'll hear it!