The melody of I Kissed A Girl by Katy Perry runs 278 notes across 45 bars, 2:34 long in Am at 125 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 Kissed A Girl chords and lyrics.