Pictured: Justin Bieber shadowboxes with a friend INSIDE Anne Frank museum... then shrugs off controversial visit on trip to gym

By Kailey Harless

PUBLISHED: 13:47 EST, 15 April 2013 | UPDATED: 13:51 EST, 15 April 2013

For most, the Anne Frank House museum in Amsterdam is a sombre place to reflect on the atrocities of World War 2.

But not if you're Justin Bieber.

Pictures have emerged of the 19-year-old singer shadowboxing with a member of his entourage during his visit to the museum on Saturday. 

He also appeared to be larking around while wearing a hat, hood and sunglasses.

Controversial visit: Justin Bieber shadowboxed with a friend while visiting the Anne Frank House museum in Amsterdam over the weekend

Larking around: The singer wore a hood and sunglasses inside the sombre venue

He later sparked controversy with his entry into a guestbook, in which he said he hoped the Jewish teenager who died in a Nazi concentration camp 'would have been a Belieber'

The message triggered a flood of comments on the museum's Facebook page Sunday, with branding the comment 'tasteless' and 'insensitive.'

On Monday, the only self-reflection going on in the singer's world was in the mirror at the gym.

In a sign he may well be the vainest of them all, he disregarded the drama caused by his comments by posting a series of shirtless self-portraits on Instagram.

What controversy: Justin shared a self-portrait taken during a gym session on Monday

Focused on his favourite topic: The star failed to address his latest controversy over Anne Frank

Attempting to mock those who criticise his penchant for stripping off, he wrote: ‘Breaking news worldwide @justinbieber just posted 2 shirtless pictures he must be going crazy’ -funny people #forthefansanyways #dontbecreepin :p'

The star - who is currently on tour in Europe - didn't address his visit tp the famous home where Jewish wartime diarist Frank and her family hid from Nazi persecution for two years during the Holocaust.

After spending an hour touring the home on Saturday, which opened as a museum in 1960, Bieber wrote a message in the guestbook, which read: 'Truly inspiring to be able to come here.

'Anne was a great girl. Hopefully she would have been a belieber.'

Sharp exit: Justin Bieber leaving the Anne Frank House in Amsterdam on Saturday after writing a comment that has Facebook and Twitter fans outraged

The Anne Frank House staff-run Facebook page shared the singer's comments.

But since the the museum updated its page with Justin's words, the Facebook post has garnered hundreds of comments expressing dismay over the young pop sensation's presumptuous remarks.

Many described it as 'disrespectful,' 'disgusting' and an 'embarrassment to Canadians.'

Belieber battle: Hundreds of people left comments on the Anne Frank House's update about Justin that expressed disgust

From Justin to Anne: 'Truly inspiring to be able to come here. Anne was a great girl. Hopefully she would have been a belieber.'

Hundreds of people took to Twitter to express outrage, branding the singer a 'moron' and 'douche,' leaving several to question whether he actually wrote such a shocking message.

Buzzfeed reports that BBC reporter Anna Holligan received confirmation from the Anne Frank House press office.

The press office commented: 'He was very interested in Anne Frank.'

Handling the situation with grace, they said of his odd note: 'He's 19, it's a strange life he's living, it wasn't very sensible but he didn't mean bad.' 

People on Twitter seems to disagree, some even saying it's time to take Bieber to rehab.

One person even tweeted: 'When life gets done with Justin Bieber, I have a feeling it isn't going to be pretty.'

Another wrote in regards to Justin's note in the guestbook: 'I weep for humanity.'

Further driving the point home, an additional shocked Twitter commenter said: 'He has no right to say this.'

Anne Frank wrote her now-famous diary while residing in the house, with the teenager describing it as luxurious compared to other hiding places she had heard about.

The Frank family moved to Amsterdam from German in 1933 - the same year the Nazis gained control over Germany.

By 1940 the Nazi had occupied the Netherlands, leaving the family trapped in Amsterdam.  

Justin Bieber under fire for 'tasteless' 'Belieber comment at...

Not happy: People took to Twitter to express their dismay over the pop star's disrespectful comment in the Anne Frank House guestbook

In 1942 the family went into hiding in the hidden rooms of Otto Frank's office building, as persecution of the Jewish population increased under the Nazi regime.

But after two years the group were anonymously betrayed and were sent to their deaths at the Bergen-Belsen concentration camp, where Anne died of typhus in 1945.

Otto Frank, Anne's father, returned to Amsterdam after the war and discovered her diary had been saved. It was published in 1947, leading to her posthumous fame.

Monument: This statue of Anne Frank stands near her home in Amsterdam, where Justin visited on Saturday and signed the guestbook