Rihanna fans will have to wait a little longer than expected to see the award winning singer in concert. Her "Anti" tour, slated to kick off in late February, has been pushed back once more — leaving many disappointed fans asking, "why?"

According to a report from Billboard magazine, the "Work" singer's tour will not be starting until March 12. Performances in San Diego, California; Houston, Texas; Austin, Texas; Dallas, Texas; New Orleans, Louisiana; Oakland, California; and San Jose, California, have been postponed from their original end of February dates to May. Sources tell the publication that Rihanna's people feared her show would not be ready in time due to issues with production. He rep confirmed that "production delays" were to blame, offering no more information on the matter. Rescheduled dates are as follows:

May 1: Talking Stick Resort Arena in Phoenix, Arizona

May 6: SAP Center in San Jose, California

May 7: Oracle Arena in Oakland, California

May 9: Viejas Arena in San Diego, California

May 13: American Airlines Center in Dallas, Texas

May 14: Frank Erwin Center in Austin, Texas

May 15: Toyota Center in Houston, Texas

May 17: Smoothie King Center in New Orleans, Louisiana

May 18: Phillips Arena in Atlanta, Georgia

Rihanna's tour date bump comes just after the singer canceled her Grammy Awards performance. Her decision not to perform was made last minute, leaving many viewers disappointed. Medical reasons were cited as the reason for her having backed out of the award show. Billboard reported that Rihanna had planned to sing "Kiss It Better," off her latest album, but was not able to make it happen. She apologized to her loyal fans, known as the Rihanna Navy, on Twitter and thanked both the Grammys and CBS for supporting her decision.

A statement from her rep, issued to Entertainment Weekly on Feb. 15, stated that the singer was put on "vocal rest for 48 hours" by her doctor. Rihanna's physician reportedly worried that performing at the Grammys could cause her vocal chords to hemorrhage. Her rep said she was taking antibiotics, but had not improved enough at the time to take the stage. 

Rihanna's "Anti" world tour will kick off March 12 with a performance in Jacksonville, Florida. She will be joined in concert by Travis Scott and Big Sean.