Justin Bieber and Selena Gomez were at it again, and this time there were unintended beneficiaries ... some random people at a hotel bar who got to hear Justin serenade Selena for free.
The Biebs plopped his butt on a piano stool at the Montage hotel bar in Bev Hills Friday night and sang "My Girl" to his on-again-off-again-on-again-off-again-on-again-off-again GF.
After the mini-concert, they strolled through the empty streets of Beverly Hills.
It's the first time they've been seen together in more than a year.
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