I don't watch the show, but it sounds like one of Hef's ex-girlfriends. I only know the names - Holly, Kendra (with the annoying laugh)... Or one of the others...thats my guess.
Are you gonna eventually tell us or just torture us to no end?Ok OK! A few hints....
She's a US star
She has ties to a major reality TV show
She's about 25-28