ROUND UP: CHRIS & RIHANNA RUMORS

So the rumors don’t stop with Chris Brown and Rihanna being the new “it” young couple on the scene. After looking cozy at LA Reid’s post-Grammy party (above), People reported that Brown was recently spotted at Rihanna’s 20th birthday party:

When partygoers (like Kanye West and Wilmer Valderrama) weren’t flinging cupcakes, they offered a standing ovation after Chris Brown sang an acapella version of “Happy Birthday.” While Brown has denied that he and the birthday gal are dating (”We’re just friends … we hang out,” he told PEOPLE at a post Grammy party), a party guest tells us the two were cuddling and acting “very cozy all night.”

Folks are saying they are definitely together after this photo of Rihanna visiting Chris on the set of Jordin Sparks new video leaked out. Who knows - this girl has been linked to everybody by now…