Just don't expect him to be there at Sunday's Grammys: "I'm going alone, as always!" she told Us. "Even when I was in a relationship, I always have gone alone."

She then added, "I'm still single, if that's what you really want to ask!"

Single? What about the trip to Dubai? Or all that frolicking Rihanna and Matt Kemp did in Cabo San Lucas, Mexico? Or the pic of them at the NBA game below?

"It was a blast!" she said, coyly, about all of the above.

If Rihanna and Matt Kemp aren't dating ... what are they?

As for the Grammys Sunday night, she said she is "excited" about being nominated for Best Rap/Song Collaboration with Jay-Z and Kanye West for "Run This Town."

"This was actually the first music we did since the last Grammys," she said. "It's exciting that it's nominated. We cannot wait. We hope we bring home the bacon."

Even if she doesn't, she'll enjoy this year's show more than last. Rihanna's appearance at the 2009 Grammy Awards was cancelled after Chris Brown ... you know.

Kemp yesterday denied rumors involving his own abusive past.