Watch: Justin Bieber sings 'My Girl' at piano bar

Apparently, Justin Bieber is warming up for his next tour by playing surprise gigs in piano bars.

The reformed bad boy was seen, heard and Instagrammed crooning the Motown classic My Girl to on-off-on again girlfriend Selena Gomez in a Beverly Hills hotel.

We'll have to take the poster's word for it. It was pretty dark in there.

However, the shadowy figure sound and look like the Biebz: It was a stringy fellow in a baseball hat and tank top.

Apparently, the Bieber-Gomez reunion came too late to make the deadline for the final seating plan at Sunday's American Music Awards. They'll both be in the front row, just not next to each other.