Justin Bieber: Look at All My Portuguese Fans!

Justin Bieber may not have enough fans in Portugal, but he still has some ... and they all turned out to say hi as he arrived in Lisbon Monday.

As we previously reported ... Bieber cancelled one of two planned concerts because of lackluster ticket sales.

Bieber is bragging that he's sold out the second concert. We're assuming that's because people from the cancelled concert are going to the remaining one.

In fairness ... the unemployment rate in Portugal is 17% and ticket prices range from $52 to $470.