04/07/2010 AT 6:00 PM ET
For the star of a Vegas production called PEEPSHOW, Holly Madison is adept at keeping things under wraps – at least when it comes to her relationship with Good Charlotte guitarist Benji Madden.
They were virtually inseparable over the past week in Las Vegas. She wore a “Team Benji” shirt to support his celebrity boxing bout on Saturday and was spotted with him again as he deejayed at Moon Nightclub’s Bang Tuesdays.
She’s called them “adventure buddies,” and while she doesn’t shoot down the suggestion there’s a romance, she’s coy about what they really do have going. When asked if they’re just friends, she says, “something like that.”