The Sorry singer bailed on a $130 bar tab after a heated exchange that nearly turned into full-blown fight. It’s weird, just when it feels like he’s gaining a little maturity the dude step back into teenager-dom. Here’s the scoop, according to TMZ:

Justin kicked off his tour in Seattle Wednesday night, but on Sunday night he and 7 pals hit up The Whisky Bar and ordered a round of shots. Sources at the bar tell us they asked for a mid-range blend and got GlenDronach … a 12-year-old single malt scotch, $15 per shot.

We’re told the group went out for a smoke and never came back to pay the bill, but they were all caught on surveillance cams.

One member of JB’s entourage tells us trouble started when a female fan wanted a pic, but was denied by one of Bieber’s dancers. That’s when a guy with her got pissed, and started yelling and making a scene. We’re told Justin’s group decided it was best to get outta Dodge before a fight started.

Our source says one of Justin’s bodyguards was supposed to pay, but obviously didn’t in the chaos. We’re told they settled up with the bar Wednesday night.

Hmmm, yeah, good to avoid a fight but probably even better to pay what you owe before you leave, bro.