Justin Bieber's pet monkey was seized by custom officials after the singer sneaked it into Europe on his private jet.
Bieber, 19, faces prosecution in Munich as he did not have papers for Mally, The Sun reports.
According to the newspaper, the star insisted the pet went with him on a transatlantic flight.
He broke strict health laws by sneaking the primate into Germany on his private plane.
A source said: "Justin has been acting like a right diva. He is out of control and lives in an alternative reality to the rest of us.
"He didn't think about the potential risks of flying a monkey from one continent to another.
"He and Mally go everywhere together. He will be heartbroken it has been put in quarantine."
It is believed Mally is a capuchin monkey given to Bieber for his 19th birthday by music producer Jamal Rashid.
The Daily Mail reports that custom officials in Germany demand to see detailed paperwork from pet owners, especially if the flight arrives from outside the EU.
It is thought Justin travelled on to his next destination, Austria by bus and without his beloved pet.
He could be forced to pay a fine of more than £10,000.
A customs spokesman told The Sun: "The animal required a certificate of health and other authorisations.
"You cannot just land with a wild animal and bring it into the country if the flight has not originated from another EU country and you don't have the proper paperwork."
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