Rihanna went to dinner at Giorgio Baldi last night, and while that's not news, we couldn't help but notice that the 26-year-old R&B star was looking extra glamorous in this gorgeous white outfit. Loves it!

RiRi will take the stage with Kanye West and Paul McCartney to perform their new song, "FourFiveSeconds," at the Grammys tomorrow night, but apparently she's worried about her ex-boyfriend Chris Brown being there. As you may remember, back in 2009 the former couple got into a horrific brawl after attending a pre-Grammy bash, which put RiRi in the hospital and saw Chris pleading guilty to felony assault charges.

"She has a big performance and she wants it to be her night," a source told HollywoodLife. "She doesn't want it to be dominated by everyone leaving the show talking about Chris and Rihanna in the same building. The Grammys are about the celebration of music and Rihanna has a job to do, she wants it to be drama free so she wants Chris not to be there. She will not tell him personally but feelers have been sent out that she doesn't want him there and hopefully he will listen."

Guess we'll find out tomorrow!