There may be another reason Rihanna cancelled her Grammy performance other than the previously reported bronchitis.

According to TMZ, the Bajan singer "was loudly expressing displeasure over her rehearsal" and was "loud and upset" before music's biggest award show. Previous reports cited bronchitis as the reason RiRi didn't take the stage on Monday night (Feb. 15).

“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,” a rep from her camp stated that night. The green-eyed beauty also tweeted that she was "so sorry I couldn't be there" before thanking the Grammys and CBS for their support.

The news of bronchitis immediately drew some skepticism; she'd performed flawlessly at another Grammy event two nights prior.

We're sad that we couldn't see RiRi perform e -- especially since the rumored performance sounds pretty epic. Late Late Show host James Corden was slated to introduce the 27-year-old singer in an '80s-styled talk show set before she performed "Kiss it Better" from her multi platinum album, Anti. There was even going to be a faux interview between the two.

Nonetheless, we hope Rihanna is okay, no matter the reason for the cancellation.

Check out Rihanna's tweet to the navy below.