LAS VEGAS (AP) John Travolta fans finally have their two big wishes: His return to movie musicals after almost 30 years and his first role as a plump Baltimore housewife. Travolta heads the bill in a new production of Hairspray, whose cast helped preview the film Wednesday night and blew the roof off the joint with show-stopping footage and live music-and-dance numbers at ShoWest, an annual convention of theater owners. Ive had the itch for 30 years to return to movie musicals, said Travolta, who wears a fat suit and prosthetic jowls for the gender-bending part, his first musical role since 1978s Grease. I thought maybe its smart to come back to it in a whole different way, an unexpected way. Because how do you top Grease? Travolta told The Associated Press. Adapted from the Broadway stage hit, which in turn was based on John Waters 1988 cult film starring Ricki Lake, Hairspray is the story of Tracy Turnblad (newcomer Nikki Blonsky), an overweight sweetheart of a Baltimore girl who takes a stand for civil rights in the 1960s by leading the charge to integrate a teen dance show on television. Travolta plays Tracys tubby mom, Edna, a role originated by Waters regular Divine in the first film. With Adam Shankman directing, the new film features Michelle Pfeiffer as the villainous TV station owner and mother of Tracys rival, Queen Latifah as the saucy record-shop owner Motormouth Maybelle, Amanda Bynes as Tracys best pal and Christopher Walken as Tracys dad and Ednas husband. Walken gives Travolta an affectionate kiss on the cheek in one scene. When Travolta first appeared on screen, it took a few moments for the crowd of theater owners to realize who it was. They began whispering to one another, Thats John Travolta? Each of his scenes were greeted with hearty laughs and applause as Travolta played the part with surprising sweetness and femininity. I tried to make it so you never really knew it was me, that you thought it was some sort of eccentric overweight woman. Divine always had kind of the wink that it was a man playing a woman, but I tried not to have the wink, said Travolta, who spent five hours a day getting into his makeup and did his four musical numbers for the film inside the hot, heavy get-up. Its not easy, but part of my character interpretation is I pretended that she thought she was 100 pounds. I played opposite the weight, like a flying elephant or something. Pfeiffer, a fan of the Broadway version, said Hairspray has a deceptive social consciousness wrapped up in a sugary, toe-tapping package. Its very entertaining, very funny and at the same time deals with subject matter that is really uncomfortable for most people to talk about, Pfeiffer said. You dont realize that this kind of brilliant message about bigotry and racism is being washed over you while youre being entertained in this sort of sweet, innocent way. Latifah, who scored an Academy Award nomination for her previous movie adaptation of a stage musical, Chicago, said she loved both Waters original film and the Broadway adaptation of Hairspray. This was a chance for us to do it our way. I always like to see what happens when a director and the studio use their imagination to bring something from Broadway to the screen, especially when its been on the screen, then Broadway, now back to the screen, said Latifah, who performed one of her numbers from Hairspray for theater owners Wednesday night. Fans of Waters and the Baltimore milieu of his films can take heart that the original filmmaker endorses the new version, which hits theaters July 20: Waters appears in a cameo near the beginning of the film as a dirty old man who flashes Tracy on the street.