Purple Rain by Prince is in Eb at 58 beats per minute and runs 5:10 across 33 bars. It uses 9 chords — Bb, Gm7add11, F, Eb, Gm7, Ebsus4, N.C., Fsus4, 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? Purple Rain guitar melody tab.