The melody of Bad Idea by Sara Bareilles runs 445 notes across 73 bars, 3:17 long in D at 168 beats per minute. The tab sits almost entirely in the first two frets, 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? Bad Idea chords and lyrics.