I completely agree about the background harmonies. That's why Cimorelli is best when listened to through head phones. And btw their two most recent videos are a Justin Timberlake/ Halsey mashup and a Shawn Mendes mashup.

Before couple of months you was always reacting to CIMORELLI react to them again please: thank u next / top 20 songs of 2018

REACT TO CIMORELLI’S COVER THANK U , NEX PLEEEEASE