The melody of My Boo by Usher & Alicia Keys runs 549 notes across 64 bars, 3:06 long in Gm at 85 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? My Boo chords and lyrics.