Justin's got a new toy! The singer test drove his new customized motocross bike on Tuesday, with wife Hailey Baldwin looking on. Biebs forgot his helmet ... but he literally rode half a block down the street in front of his Beverly Hills mansion, so we're pretty sure it's okay.

When the bike was delivered, Hailey shot video of the arrival and a professional photographer documented the event.

Justin looked kinda weird, though ... check out the top video around the 0:08 sec mark when he walks away. Doesn't he look kind of depressed? What guy wouldn't be a little more excited about getting his Drew House motorcycle deliver?!