Hello! These are the 'Back in your head' chords that Sara plays live now, as of September 2014. *Standard Tuning *Capo on 1st fret. ***All positions relative to capo Chords used: E Eadd9 B5 A5 C#m C#5 A5* B5* e|-0---2------------0---------------| B|-0---0------------2---------------| G|-1---1------------1----6---2---4--| D|-2---2---9---7----2----6---2---4--| A|-2---2---9---7----x----4---0---2--| E|-0---0---7---5----x---------------| The strumming pattern is [d d~ n m] n:Do Nothing m:Down strum, all strings muted. Intro: E - Eadd9 - B5 - A5 [x4] Verse: C#m Build a wall of books E Between us in our bed C#m Repeat, repeat the words E That I know we both said C#m Relax into the need E We get so comfortable C#m Remember when I was E So strange and likeable Chorus: E Eadd9 B5 A5 E - Eadd9 - B5 - A5 I just want back in your head E Eadd9 B5 A5 E - Eadd9 - B5 - A5 I just want back in your head E Eadd9 B5 A5 E - Eadd9 - B5 - A5 I'm not unfaithful but I'll stray C#5 A5* When I get a little scared C#5 When I get a little scared A5* When I get a little Do Verse again: When I jerk away from Holding hands with you I know these habits hurt Important parts of you Remember when I was Sweet and unexplainable Nothing like this person, Unlovable Do Chorus again: I just want back in your head I just want back in your head I'm not unfaithful But I'll stray C#5 A5* When I get a little scared C#5 When I get a little scared A5* When I get a little scared When I get a little B5* C#5 A5* Run, run, run ... Run B5* C#5 A5* Run, run, run ... Run Do Chorus again: I just want back in your head I just want back in your head I'm not unfaithful But I'll stray [x5] End on C#5 That's it, I hope you enjoy playing it. Imho, I think this is way easier to play than the original version, much more user-friendly, not as much tuning.
Source: https://tabs.ultimate-guitar.com/tab/tegan_and_sara/back_in_your_head_chords_1642081