Justin Bieber performs at Time Warner Cable Arena in Charlotte, North Carolina, Tuesday, January 22, 2013. (Jeff Siner/Charlo
Jeff Siner

After a problematic stint in London, Justin Bieber's woes continue.

For reasons unknown, and despite the "Boyfriend" singer tweeting today: #SundayFunday, his concert on Tuesday in Portugal has been cancelled

A statement posted on the venue's website reads: "Due to unforeseen circumstances, Justin Bieber was forced to cancel the second performance in Portugal, March 12. The Canadian singer is eager to play for the Portuguese fans on March 11."

This concert cancellation is just the most recent of several misfortunes for the Biebs. 

His four-night residency at London's O2 arena included a birthday debacle, a late concert, a fainting spell, an altercation with paparazzi and even a harsh diss from Noel Gallagher (although Liam seems to like the kid). 

Keep your head up, Biebs!