Selena Gomez is back together with Justin Bieber.
And back to her hard partying ways.
As previously reported, one insider claims Selena and Justin are smoking weed like crazy inside the latter's Mercedes, while we can now confirm the police were called to Gomez's Hidden Hills home last night.
According to law enforcement records, neighbors called 911 to voice complaints over the noise levels emanating from Selena's records.
The singer was not placed under arrest when authorities arrived, but she was told to keep her shindig down.
Selena supposedly rekindled her romance with Bieber because he
looks great with his shirt off cleaned up his act...
... but video has already surfaced of the two acting wild at a party (below), while friends don't believe it's a coincidence that Gomez has returned to drinking and drugging since getting it on again with The Biebs.
They are concerned for their pal.
Remember, of course, that Gomez spent weeks in rehab earlier this week, with most attributing that stint to her difficult relationship with Bieber.