Rihanna may have had a meltdown right before the Grammys, forcing her to walk out on her scheduled performance.

There are conflicting stories as to just why the ANTI singer didn’t perform at the biggest music award show earlier this week.

According to TMZ:

Sources connected with the show and several sources who were not connected but present at the show tell TMZ … the singer was loudly expressing displeasure over her rehearsal. They say she was loud and upset and, as we first reported, bailed on the event.   

Sources close to Rihanna say she had bronchitis that was so bad she could not perform – and that’s why she was so upset. But two nights prior, RiRi sang perfectly at a charity event and people present during rehearsal say she sounded great there, too.