If you were looking to see what Rihanna was going to wear to the Grammys or see her perform, you're out of luck. 

According to TMZ, Rihanna has just canceled her Grammy performance. Sources say the singer arrived at the Staples Center, participated in her rehearsals but left before she was scheduled to walk the red carpet. 

TMZ reports the singer has been taking antibiotics for bronchitis. She rehearsed twice before a doctor on-site advised her that she should not perform because she is at risk of permanently damaging her vocal chords. She has been put on vocal rest for 48 hours. 

Many people were looking forward to her red carpet arrival. She was going to perform "Kiss Me Better" during the 58th annual Grammys in Los Angeles.