This is an awesome song and it's also my first TAB ever so...here it goes! Line It Up has a very simple structure: Part(A),Part(B), and then back to(A) The intro is super easy and it occurs throughout the song with slight variation. (intro)Part A e|--1-2-5-2-----1-2-5-2-5---------------------------------------| B|3---------3-3-------------- Repeat 12-------------------------|x's (until verse begins) G|--------------------------------------------------------------| D|--------------------------------------------------------------| A|--------------------------------------------------------------| E|--------------------------------------------------------------| I use full BAR chords when I'm playing it(no band to back me up) but I think PSI is just POWER chords which are the bottom two notes of each chord below. Each chord gets 4 beats. (chords)Part A e|--3---0---2---2---3---0---2---------------| B|--3---0---4---2---3---0---4---------------| G|--4---1---4---3---4---1---4---------------| D|--5---2---4---4---5---2---4---------------| Repeat 8x's 5---5---2---2---4---5---2---2---------------| E|--3---0---x---2---3---0---x---------------| G E B F# G E B (chords) Part B e|--4---5---0---2---------------| B|--5---5---0---4---------------| G|--6---6---1---4---------------| D|--6---7---2---4---------------| Repeat 4x's A|--4---7---2---2---------------| E|--x---5---0---x---------------| C#m A E B Repeat Part A 5x's and end the song with chords: G---E---B-------} ===========================================================================