All I Need by Christina Aguilera is in Ab at 68 beats per minute and runs 2:39 across 30 bars. It uses 9 chords — Eb, Bb, Cm, Abmaj7, Ab, G, G7, Fm, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? All I Need guitar melody tab.