Justin Bieber’s monkey was seized by customs officials after the singer demanded Mally accompany him on a long-haul flight to Germany.

Justin Bieber’s increasingly bizarre behavior is concerning aides after he insisted Mally travelled on his private jet – even though he had no paperwork to show to customs officials in Munich.

According to sources, Justin Bieber, 19, who had travelled from LA to Munich, was “detained for some time” by furious customs officers who demanded to see a health certificate for the monkey – which the teen idol could not provide.

Justin Bieber’s monkey was seized by customs officials after the singer demanded Mally accompany him on a long-haul flight to Germany

Mally is now in quarantine and Justin Bieber could face prosecution from German authorities and a $15,000 fine.

A source told The Sun: “He and Mally go everywhere together. He will be heartbroken.

“Justin has been acting like a right diva. He is out of control and lives in an alternative reality to the rest of us.”

The friend likened capuchin monkey Mally, who was given to Justin Bieber as a birthday present from music producer Jamal Racshid, to Michael Jackson’s beloved pet Bubbles – who accompanied the tragic singer to a number of concerts.

Customs officials in Germany demand to see detailed paperwork from pet owners, especially if the flight originated from outside the EU.

Justin Bieber has been on a hectic schedule, going from Poland to LA on Monday in his luxury Cessna Citation, and then onto Munich on Thursday.

It is thought Justin Bieber travelled on to Austria by bus – but without his beloved pet.

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