SIN CITY beauty Jessica Alba has slammed celebrity lovers TOM CRUISE and KATIE HOLMES for using their heigh profile romance to boost both their careers.The Latina actress thinks celebrity couples prostitute their relationships when they reveal intimate secrets and insists they only do so to sell movies and win roles. She says, "I don't date actors and I don't date people to get ahead in my career."I don't want to comment on Tom's relationship with Katie... But I'm a very private person and I don't feel you should talk about your private life. "I think it's best to keep this sort of thing to yourself." Of her romance to producer CASH WARREN she recently gushed, "I'm madly in love with Cash."Alba installed her no-actor rule after failed relationships with MARK WAHLBERG and her DARK ANGEL co-star and fiance MICHAEL WEATHERLY.