I let my National Enquirer subscription run out months ago (too expensive to get it shipped up here to the frozen north), but I always pick up the "Who's gay... and who's not" edition, baybee.
I'll save you the dough. Yes, she's gay or bi: Cynthia Nixon, Megan Mullally (married to a guy), Jillian Armanente and Alice Dodd (married to each other), Heather Matarazzo, Anna Nicole Smith, Cher (an experimenter), Sara Gilbert.
Rumoured: Martha Stewart, Tatum O'Neal, Paris Hilton, Jorja Fox, Cindy Crawford, Queen Latifah (though not so lesbian friendly in her book....).
Has shown herself to believe in the art of acting by so courageously (ha!) playing a dyke or bi gal on TV: Eva Longoria, Kim Cattrall, Debra Messing, Laura Innes, Mischa Barton, Charlize Theron (though being Aileen Wuornos was extra tough because the murderer was not a glamor gal).
That's it, eh.