The stresses of a world tour seem to be getting to Usher Raymond.  We're getting reports from our European readers that Usher is missing his Euro dates and it's not because of "illness" like his reps have been making people believe.

We've got video of Usher struggling to get through one of his songs and leaving the stage in the middle of it.  And juicy details about him allegedly getting caught drinking and popping pills at a bar after cancelling his Berlin concert.  Read on for the deets....

Usher's reps stated earlier this week that he would be cancelling his Berlin tour date due to illness.  But apparently, the Berlin and European fans believe something else is going on.

Here's an email we received from a reader in Berlin about Usher getting caught drinking and possibly partaking in some "substances" at a bar right after he cancelled his tour date:

Hey Natasha!

I'm from Germany and I'm pretty sure that almost none of you heard about the BIIIIIIIIIIG Usher scandal in Germany. Yesterday, Usher had his first show of his OMG Tour in Germany/Berlin and after the previous artist, Tinie Tempah, fans waited more than 40 minutes until the management cancelled the show because Usher "wasn't feeling well" and they postponed it to today.

It is also said that he was seen in Berlin in a Cocktailbar after cancelling the concert! His fans had to wait about 40 more minutes today until he came on stage. There were five songs (sung only playback not live), interrupted by several 5-minute breaks during which Usher left the stage without further announcements and a "DJ" took over for a few minutes.

Then the fiasco took its course: as Usher sang a song which he sang "wrong and crooked", he interrupted the song and gave an excuse for the cancellation of the previous day. While trying to sing everybody booed at him.

Usher's reaction: he sat down and put his head on the microphone. After he had sung for another 10 seconds, he went off the stage. The lights went on and the concert was over. Fans from all over Germany, Austria and other countries came to see him and then something like this happened.  No one knows exactly what happened, if he's really ill or if he took drugs, too much alcohol. I thought this might be interesting for you and sorry for my bad English!

Here's a few videos where Ursh had a break-down mid-song and looked visibly ill and disturbed. He told his fans he would have to postpone and return at another time:

What's really hood Ursh?