Kozmic Blues by Janis Joplin is in Am at 60 beats per minute and runs 2:15 across 30 bars. It uses 6 chords — Am, Dm, F, G, E7, N.C.. 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? Kozmic Blues guitar melody tab.