I’m In Love With A Monster by Fifth Harmony is in C#m at 144 beats per minute and runs 3:10 across 74 bars. It uses 7 chords — N.C., C#m7, F#m, G#, C#7, C#m, G#5. 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’m In Love With A Monster guitar melody tab.