The melody of I Don’t Believe You by P!nk runs 313 notes across 49 bars, 3:50 long in Db at 94 beats per minute. The tab sits low on the neck, mostly under the fourth fret, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? I Don’t Believe You chords and lyrics.