Really enjoyed there audition on X Factor USA so wanted to learn the music because I noticed it was different from the original by Britney Spears. Also Melanie Martinez did a version on the voice that im sure inspired Alex and Sierra but Melanie played it like the Britney Spears tab are showing. to me it seems like its a half step down from the original, with a couple small differences. im only going to list the chords because im writing this on my phone. Anyways... Capo on 2nd fret, remember all chords are acting with capo as the nut the verse: , . you can do the walking bass line by using your pinky to fret the 3rd fret of the 6th string then play that twice then the open fifth string the chorus: , , . you can go to the by moving the finger fretting the 4th string 2nd fret in the chord to the 6th string 2nd fret the looks like this -0- -1- -2- -0- -0- -2- thats about it really, occasionally you do a walk into the from an during the chorus hopefully this helped a couple of people, you can show appreciation by rating!