Rihanna Cancels Tour UPDATE [IMAGES]: RiRi 'Sick' for Diamonds World Tour Houston Dallas Cancelations, Fans Call OUT Pictures Of Songstress Partying

Rihanna canceled yet another stop on her Diamonds World Tour. Houston fans were disappointed Tuesday night, at the abrupt cancellation. But today, RiRi has a doctor's note, and rumors are swirliing that she may cancel her apperance Wednesday night in Dallas. While RiRi maybe be sick, recent social media antics have, fans are debating on how "ill" RiRi really is.

The "Stay" singer addressed her concert cancelation via a fan account in a signature "Rihplie." She said "she was sick since San Diego, but thought she could keep going on."

The pop star, has been working nonstop for almost a decade, with a recent record of seven albums in seven years. She was spotted back in Beverly Hills, dressed casually leaving as she worked out a doctor's office.

We reported Tuesday that Rihanna was partying all weekend in Vegas, apparently for bestie and sister/friend Melissa Forde's birthday. Rihanna posted a pic partying on her tour bus, just days before the Houston cancelation.

Fans are not pleased with Rihanna's behavior. While the songstress is reporting that she is ill, she continues to post pictures of herself smoking and partying.

RiRi will be making up for the cancelations at a later date, with concerts in Houston, Boston, and Baltimore.