According to TMZ, insiders who were present during the Rihanna’s rehearsals for her Grammy performance say she was upset. They claim she had a “meltdown” and was loud, angry, and displeased with the run-through before leaving Staples Center.

RiRi’s team provided an explanation as to why the singer had to back out of the performance. “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 chords.”

That same night, she posted a tweet to her Navy, saying that she was “so sorry” she “couldn’t be there,” but didn’t provide a reason for her absence.

Rihanna was set to perform “Kiss It Better” off her platinum album ANTI .