Justin just can't stop singing! Apparently it's a way of professing his love for wife Hailey Baldwin and we think it's adorable!

Bieber belted out Marvin Gaye's "Sexual Healing" the other day in front of the Montage Beverly Hills where the couple shares a penthouse residence. Today, after lunch at Il Pastaio, he felt inspired on the way to the car and sang at the top of his lungs in the parking garage on their way to the car! Watch and listen!