The melody of Brokenhearted by Karmin runs 496 notes across 75 bars, 3:14 long in E at 120 beats per minute. The tab sits moving up the neck in places, 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? Brokenhearted chords and lyrics.