SYNOPSIS: They’re Marilyn Monroe, Cher, Edith Piaf, Carol Channing and Liza Minnelli. Well not really. They’re female impersonators and in LIP GLOSS, Lois Siegel casts a wry camera on what’s behind the long legs, swivel hips, stuffed girdles and bouffant hairdos. Candy Stevens, from Fire Island, does a fire dance, and Shelley, who has had a surgery, swims in the neighborhood pool. Les Ballets Trockadero de Monte Carlo features ballerinas with unshaven armpits and hairy legs. And Halloween night at the Bellevue Tavern is a pure trickery.