The melody of If U Seek Amy by Britney Spears runs 667 notes across 76 bars, 3:25 long in Am at 134 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? If U Seek Amy chords and lyrics.