Something does not sound right! After backing out of the Grammys at the very last minute, Rihanna has now announced that she's postponed the start of her "Anti" world tour, which was supposed to debut next weekend.

The show was slated to kick off on Friday, February 26, at San Diego's Viejas Arena, but has been pushed back to start on March 12 in Jacksonville, Florida.

Riri has moved back her first eight shows in San Jose, Phoenix, Texas, New Orleans and Atlanta. The shows have been moved from March to May due to "production delays," according to the singer's reps.

This bold move comes on the heels of Rihanna's disappointing fans on Monday when she pulled out of the Grammys a half hour before the show was slated to start due to "bronchitis."

A statement from Rihanna explained, "Based on Rihanna's examination, after Grammy rehearsal today, Rihanna's doctor put her on vocal rest for 48 hours because she was at risk of hemorrhaging her vocal cords. The antibiotics she has been on for three days did not kill the infection adequately, therefore she cannot perform safely."

We have a feeling there's more to this story ...