Canadian Bieber's increasingly bizarre behaviour 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 the 19-year-old, 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 Justin could not provide.
Monkey
business: Justin Bieber's beloved monkey Mally has been seized by
customs officials after the star allegedly demanded to travel into the
EU with his pet
Mally is now in quarantine and teen idol Justin could face prosecution from German authorities and a £10,000 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 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.
Primate
pals: Justin went in to perform on stage at the Olympiahalle in Munich
as Mally stayed in quarantine at the star's expense
Seized:
Customs officials at Munich Franz Josef Strauss Airport (pictured) took
Mally into quarantine after discovering Justin didn't have the right
paperwork
Customs officials in Germany demand to see
detailed paperwork from pet owners, especially if the flight originated
from outside the EU.Justin 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 the Boyfriend singer travelled on to Austria by bus - but without his beloved pet.
The superstar denied he was having a breakdown after he kept fans waiting for two hours at the O2 in London and then went on to swear at photographer in a bizarre rant.
Snappy at a snapper: Justin Bieber fuelled speculation over his bizarre behaviour after this altercation with a photographer
A source revealed how the star has been reliving his 2011 appearance as the host 'Saturday Night Live' by replaying the tape - along with his own videos - to his entourage on the tour bus
HollywoodLife.com were told: 'It's so awkward. I mean Justin did a good job on the show, but no one wants to watch it again and again.
Good influence: Since Justin split from long-term love Selena Gomez friends say he has gone off the rails
'Being
stuck on the bus for hours on end is bad enough without having to watch
Justin do his monologue again and again, but no one says anything.'Selena used to tell him what was up and it must have helped keep him grounded, because since they broke up his ego is out of control.'
The insider explained Justin doesn't act quite as cocky when he's around people he respects, but his entourage don't want to speak out.
Pet: Michael Jackson with his beloved Bubbles - since being given his pet monkey Bieber is thought to be rarely apart from Mally
They
added: 'He never pulls that kind of stuff when Jayden [Smith] or
someone else he respects is there, but when it's just his people on the
bus he does it.'He does the same thing with his videos. He'll have them running on a loop, and then when he sees a part he loves, he stops and rewinds it and makes everyone watch.
'No one is into it. They all want to play video games or watch movies, not watch Justin! But they all pretend they love it as much as he does. Everyone there is pretty much on the payroll so they all just kiss his ass, and tell him how much they love watching him and his videos.'