*Uh oh Rihanna’s got a problem.

She may not be very “Loud” during her highly anticipated performance at Sunday’s Grammy Awards. That’s because she’s battling a combination of bronchitis and laryngitis.

She Tweeted a friend on Thursday saying:

“Bronchitis and laryngitis boo! I’m still goin to rehearsals tho! Sunday is everything.”

The 22-year-old superstar from Barbados is set to take the stage for music’s biggest night with Drake and has reportedly sought medical help in preparation for the show, according to RadarOnline.

We’re betting she’ll be OK for tonight’s performance.

Speaking of which, the 53rd Annual Grammy Awards will air live tonight, February 13, at 8pm Eastern on CBS from the Staples Center in Los Angeles.

Read MORE of this story at OMG.