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Chris Brown, Keri Hilson

Courtesy SETH BROWARNIK/RED EYE PRODUCTIONS

Is Chris Brown romancing a new R&B diva?

He's already collaborated with Keri Hilson musically, and last night, Chris "was all over" Keri at the Axe Lounge at Liv, where Diddy was hosting a bash and where Kim Kardashian and Reggie Bush were celebrating the Saints' big Super Bowl win.

A source tells E! News that the two were "grinding each other" on the dance floor, and Chris even made a special request...

"He insisted on her being in a photo with him as well," a source tells us.

The two left together, along with a group of friends.

No word from either of their reps, but Keri posted the following on her Twitter:

"LMAO paps think they slick!! Gone ask CB & I to tk a pic on carpet then asked da crew if we datin!! LHLAB so, no! I'mma let yall know now :P"

We'll let you decipher for yourself, but that sounds like a denial.

Ironically, Liv is the same place Brown's ex-girlfriend Rihanna hosted the Pepsi Refresh party just two nights earlier.

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Who else was dirty dancing at a Super Bowl bash?