06/19/2011 AT 1:00 PM ET
Holly Madison says some things shouldn’t happen in Vegas.
Hugh Hefner’s ex-girlfriend blasted Crystal Harris for attending a Sin City pool party Saturday on the day Harris was supposed to have married Hefner.
“That’s a new low,” says Madison, the former star of The Girls Next Door, in one Tweet.
“That’s disgusting,” she says in another, “and whoever booked her is tacky.” – Mike Fleeman