The singer was suffering from a medical condition called laryngitis and doctors have suggested her to make some lifestyle changes. "Rihanna's illness was so severe that doctors warned it could take months for her to fully recover. There were worries that she'd have to cancel her entire Diamond World Tour," thesun.co.uk quoted a source as saying.
"She was forced to cancel two concerts in Baltimore and Boston after coming down with laryngitis. She has since resumed the tour and promised to reschedule the cancelled shows," the source added.
"Rihanna is scared. She loves to smoke, drink and stay up late. Her body was bound to need a break at some point. She's now on a mission to start looking after herself," said the source.
Insiders also claim that Rihanna recognises her relationship with Chris Brown isn't having a positive influence on her. "Rihanna has received death threats, verbal attacks and has fallen out with some of her best friends recently, including Katy Perry. This has taken a huge emotional toll," the source added.