Justin Bieber Cancels Portugal Concert Due to 'Soft' Ticket Sales

Pop star Justin Bieber's rough start to the month of March appears to continue according to TMZ.com. The site reports that a scheduled Tuesday night concert in Portugal has been canceled due to "soft" ticket sales and "it felt like the right thing to do."

Sources connected with the star confirm it was a "business decision" that led to the cancellation, though sources close to TMZ report that ticket sales were still "good ... more than 60%" ... just not good enough."

Last week, Bieber suffered a fainting spell during a concert at London's O2 Arena. The singer reportedly passed out backstage after becoming light-headed near the end of his show. He was treated and given Oxygen backstage, then transported to the hospital after finishing his show.

After Bieber left the stage, his long-time manager Scooter Braun explained the situation to concerned fans. "Justin got very light of breath, the whole show he's been complaining. He's backstage with the EMTs and the doctor," Braun says. "They're telling him that they want him to see somebody and see what's going on with his lungs." Bieber was eventually able to the stage to finish his show.