Naya celebrated her birthday at Bank nightclub at the Bellagio and reportedly got über-cozy with Chord inside.
So what exactly went down? Here's what we're hearing from impeccable sources...
"They were all over each other inside," dishes a partygoer who was hanging with some of the Glee cast, including Cory Monteith and Kevin McHale in the VIP section. And as we all know, when drinks are flowing in Sin City, flirtation doesn't usually stop at the club booth.
"Yeah, they hooked up," a source at the bash tells us. "Who knows where it will go."
Naya had also briefly dated her hunky costar Mark Salling, who also happens to be good pals with Chord.
"She knew what she was doing, trying to make [Mark] jealous," adds the insider. "Funny thing is, he really couldn't care less."
Jeez, these high school players even pull the high school school stuff off camera, love it! I mean, who can forget how Mark and Naya's brief fling ended?
Rivera reportedly egged Salling's car in a jealous fit this past summer.
That's pretty ballsy thing to do over a guy you only briefly dated, and not even exclusively, mind you.
Hope Chord knows what he's getting into! This pretty girl comes with a whole bucket of crazy.
We've reached out to Naya and Overstreet's reps for comment and have yet to hear back.