This has just not been Justin Bieber's year.
One of the pop star's two scheduled concerts in Portugal was canceled Sunday "due to unforeseen circumstances," according to the concert venue's website.
No official word on why the second concert was canceled, but some reports have said that while his March 11 show in Lisbon was sold out, the March 12 show had not sold enough tickets.
The cancellation comes after a rough couple of monthsfor the pop star, which have included a very public breakup with longtime sweetheart Selena Gomez, and having what he called his "worst birthday" when he left a London nightclub just minutes after arriving.
Read more: Bieber's crazy London night -- in tweets!
Just last week, he was met with angry fans after showing up two hours late to his London concert, and he also got into a fight with the paparazzi and had to be hospitalized after he collapsedbackstage after a concert.