What Do You Mean? by Justin Bieber is in Db at 125 beats per minute and runs 3:07 across 60 bars. It uses 6 chords — Dbsus2, Ab5, Fm7, N.C., Eb, Ebsus. 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? What Do You Mean? guitar melody tab.