MOVIE: The new Hairspray has set up special Sing-A-Long screenings! They begin nationwide today, and there will be three right here in New York. If you don't like rowdy theaters, skip this one! All Weekend // Various Times // Regal Union Sq 14; Clearview Chelsea 9; AMC Empire 42nd 25 MUSIC: Head down to the Seaport for an evening of Billie Holiday tunes. Turntables on the Hudson will be celebrating the release of Billie Holiday......

- Tonight, Brooklyn Bridge Park presents Mermaids, about a pre-shoplifting Wynona Ryder and Cher in an unusual mother-daughter relationship; Wynona resents her free-style, flirty mother and intends to become a nun (despite being a neurotic Jew), that is, until she meets the hunkster caretaker of the local convent. This pretty amusing chick-flick with one too many catchy sing-alongs ("If You Want to Be Happy" etc) begins at sunset. - Clearview’s Chelsea Cinema resurrects the......

For some, watching Elizabeth Berkeley lick a pole in a Vegas show girl sparkling thong is enough to put them off their Thursday evening buzz but not Gothamist. The Dutch king of schlock Paul Verhoeven's 1995 travesty of cinema resurrected by the generosity of camp, Showgirls (1995) will be playing tonight at 8 pm at the Clearview Chelsea (260 W. 23rd Street between 7th and 8th Ave.) in its unedited NC-17 "director's cut" version. An......