Justin Bieber -- Bev Hills Neighbors Rejoice ... Ding Dong, The Biebs Is Gone!

It's been rainy and gloomy in LA all week, but it's all sunshine and rainbows for the residents of a Beverly Hills condo ... because Justin Bieber has finally moved out!

Bieber officially cleared out Monday. An email had circulated among tenants, suggesting a party when the day came that Justin was a memory ... so Saturday night should be crazy at the condo.

Biebs has terrorized his neighbors since he signed the lease back in June.

June 24 -- Days after Bieber settled in neighbors are already complaining

July 3 -- The building hires extra security

July 21 -- Cops called to the condo six times in one night for Bieber-related problems

July 29 -- Cops show up to tell residents how to handle Bieber

October 15 -- A Bieber homecoming party is busted up by cops

We've heard Bieber is looking to rent an L.A. home, but so far nothing's in cement.