I Will Always Love You by Whitney Houston is in Db at 74 beats per minute and runs 3:44 across 59 bars. It uses 15 chords — N.C., Ab, Fm, Db, Eb, Dbmaj7, Bbm7, Bbm, 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? I Will Always Love You guitar melody tab.