The One That Got Away by Katy Perry is in E at 135 beats per minute and runs 3:10 across 68 bars. It uses 9 chords — E, G#m, C#m, A, G#m7, B, F#m, B7, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? The One That Got Away guitar melody tab.