Rihanna Tweets To Ryan Seacrest: "I'm On Every Med Under The Sun"

Poor Ri! The sexy singer has been sick since Thursday, when she Tweeted: "Bronchitis and laryngitis boo! I'm still goin to rehearsals tho! Sunday is everything."

And now today marks the 53rd Grammy Awards - will Rihanna still perform?

Ri sported her red 'fro at Gucci and Roc Nation's pre-Grammy brunch at the Montage in Beverly Hills on Saturday, and Grammy reps says "as far as we know she will still be performing."

And here's a little preview of Rihanna and Drake rehearsing for tonight's performance:



Last night, the "Who's That Chick?" singer Tweeted to Ryan Seacrest with another update: "I'm on every med under the sun! Don't wanna miss a thang!!!"

Fingers crossed? And did Rihanna flip us the bird in our gallery below? Click through the pix to find out...