The melody of I Still Believe by Mariah Carey runs 405 notes across 68 bars, 2:30 long in Em at 144 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? I Still Believe chords and lyrics.