In Case by Demi Lovato is in Db at 88 beats per minute and runs 3:27 across 52 bars. It uses 9 chords — Ab, Absus2, Ebsus, Eb, Fm7, Dbsus2, Bbm, 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? In Case guitar melody tab.