sunglasses Rihanna doctor sweats hat tour tattoo chris brown

The day after cancelling her Houston concert, Rihanna headed to the doctor's office in Beverly Hills, wearing sweats and covering her face with a baseball hat.

RiRi has yet to issue a statement about the scrapped show, but she did tweet her condolences to the victims of the Boston Marathon explosions, calling the tragedy "heartbreaking."

The R&B superstar is reportedly suffering from laryngitis, and a source told The Sun, "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 tour. They've told her that she needs to make some serious lifestyle changes, or risk this happening again. This has given her a scare. But Rihanna knows it's self-inflicted. 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."

Whatever the cause of her illness, we hope she feels better!