Jason LaVeris/FilmMagic, Mark Sullivan/WireImage
June 19, 2011 01:00 PM

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

RELATED: Crystal Harris Visited Hugh Hefner on Father’s Day

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