The melody of I Wonder by Kellie Pickler runs 333 notes across 59 bars, 3:31 long in D at 132 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 Wonder chords and lyrics.