Rihanna Cancels Show in Houston...Also Confused About her Involvement WIth Chanel---Tweets She's Spokeswoman When She Isn't

Rihanna has canceled yet another show on her "Diamonds World Tour" on Monday in Houston due to illness.

"Unfortunately, following her sold out concert on Friday, Rihanna has contracted laryngitis and per doctor's instruction is unable to perform this evening," Live Nation said in a statement.

Concert-goers were advised to hang on to their tickets for a rescheduled concert date to be announced. Refunds were also available at the Toyota Center.

The Grammy-winning singer has previously canceled shows in Baltimore and Boston last month during a bout with the flu and laryngitis, but is still expected to perform as scheduled in Dallas on Tuesday.

Ironically, The tour was to promote her new album "Unapologetic." The avid Instagram and Twitter user did apologize about the cancellation on her accounts, though she did send her condolences to victims of the Boston Marathon explosions, calling the tragedy "heartbreaking." She also wished her brother, Rajad, a happy birthday.

The fashionista kicked off her high-energy 70-date tour, which features rapper A$AP Rocky as the opening act, on March 8 in Buffalo, N.Y., and is expected to wrap up on May 6 in Boston. The shows feature the 25 year old in multiple Givenchy couture costumes showing off her incredible pipes and lean bod.

After this tour, Rihanna is reportedly ready to take a break from the music biz and kick back.

"She's been in this go mode for a while," Ryan Seacrest said on his morning radio show this week. "Seven hit records in seven years...she plans to take a year off to unwind."

--Adding to the confusion, the on again, off again, girlfriend of Chris Brown also misinterpreted her involvement in the business world.

She may have her own fragrances and a brand new fashion line but she shouldnt have added Chanel spokesperson her resume without asking.

Rumors swirled earlier this year that the "Stay" singer was shooting a special campaign with the Paris-based fashion house, after she posted a picture sporting Chanel jewelry on Instagram with the caption:

"And that's a #wrap on my shoot for my new #topsecret ad campaign!!! #2013"

Yet a spokesperson for Chanel told British Vogue she has not been photographed for any such ads and the rumors are completely untrue.

The big brand announced last week that Diane Kruger is the new face of Chanel Skin Care. Sorry Rihanna....But get well soon!