Newsday from New York, New York • B5

rang B5 Entertainment Donny comes (squeaky) clean Osmond brings his unscripted tour to Westbury. Vegas, as well as a cruise. How's the sibling rivalry compared to when you were younger? It's funny, because back in the WHO Donny Osmond WHEN WHERE 8 p.m. tomorrow, NYCB Theater at Westbury INFO 800-745-3000, livenation.com olden days called the 70s, Marie was just basically in tow: "Lefs just do whatever they say." Well, Marie is her own person now. She has her say about things.

in anybody's shadow. You recently gave this advice to Justin Bieben "Put on the seat belt, buddy, because ifs Sing to be a bumpy and there's going to be times when peo BY STEVE KNOPPER Special to Newtday Forty years ago, Donny Osmond hit No. 1 for the first time with his song "Go Away, Little GirL" He was absurdly clean-cut and handsome, and he would spend the next several years as one of the most popular teen heartthrobs in pop-music history especially teaming with his sister, Marie, on a TV variety show. The whole thing crashed by the end of the 70s, and Donny spent more than a decade trying to come back. Eventually, he succeeded, with the 1989 smash "Soldier of Love," a starring role in a Toronto version of "Joseph and the Amazing Technicolor Dreamcoat" and a stream of squeaky-clean alhnm, Broadway snows, Vegas runs, a "Dancing With the Stars" victory and a family-oriented radio show (weeknights on B103).

Osmond, who plays the NYCB Theater at Westbury tomorrow night, discussed the bizarre ups and downs of his career by phone from his Utah home. Your new tour is unscripted and you take constant requests from the audience. Is that spontaneity scary? You better believe itl But that's why I'm doing it. It's the excitement of not knowing where the show's going to go. You have the structure of the show, but within that body of the show, let's say somebody says, "Hey, remember that weird video you did with Weird Al Yankovic?" Boo ml There's going to be a video behind me on the screen.

You and Marie put out an album in May and are doing the Flamingo in For the latest musk ple say you re not talented anymore. Never give up on yourself." When will his ride start getting bumpy? It's happening now. You look at any little reviews and videos kid and talk about Justin Bieber, he's like "bleah." It's inevitable. What you've got to do is hang in there and keep putting out great material. backstage Allergies should be his wife's biggest problem WHAT "The Tale of the Allergist's Wife" WHEN WHERE 7:30 p.m.

tonight Friday, Sunday, Tuesday, next Thursday and Sept 3, Mulford Farm, 10 James Lane, East Hampton INFO 866-8TI-4111, theatermania.com BY STEVE PARKS stevejMrfanewfdqy.cam Marjorie's life is such a waste that she takes it out on cartoon figurines in the Disney Store. Her midlife-crisis outburst might have landed her in jail except that her husband, a semiretired allergist, wrote a check covering the breakage. But Marjorie is her own jailer. As we meet her in "The Tale of the Allergist's Wife," set in an Upper West Side apartment, she hasn't gone out in weeks. Mulford Repertory Theater's 1721 barn yes, theater in a barn will never pass for a Manhattan condo, no matter how extensive the makeover.

Set designer Brian Leaver uses David Geiser's painting "Ra" to hint at sophistication amid chirping crickets. Kate Mueth as the director and title character suffers bathroom focused. She craves suppositories. Marjorie mopes over her self-perceived intellectual mediocrity. Art, theater and philosophy she's drawn particularly to German writers and Eastern mystics are all over her head.

She knows just enough "Siddhartha" to know she doesn't get it Playwright Charles Busch best known for over-the-top parodies starring himself in drag doesn't let us wallow in Marjorie's funk. Enter Lee, a childhood friend who's led the life Marjorie aspires to: She slept with Giinter Grass and fed Andy Warhol Campbell's soup. Played with ingratiating seductivity by Licia James Zegar, Lee is the distaff "Man Who Came to Dinner" and never left. She jolts Marjorie out of her darkness. But at what cost? Only the doorman knows.

He's appropriately starchy in his uniform as played by Joseph De Sane (costumes by Yuka Silvera). While "Allergist's Wife" is mainstream, it reflects Busch's sense of the outrageous. A three-way seduction, while more suggestive than explicit, is not kids' stuff. Some will find humor in graphic scatological descriptions, invariably delivered over food; others will be repulsed. Despite poor sightlines, the barn may be a romantic setting for some of Mulford's repertoire.

But when Lee remarks that the city has changed since she was last in Manhattan, ifs an iirtint-tnrinnal laugh ling. 8 8 Josh Gladstone is the allergist and Kate Mueth is his wife. Marjorie's anxieties convincingly. Scenes with husband Ira, played by Josh Gladstone, ring with familiar domesticity. (The two are married for real.) Gladstone's handling of his stage wife's delicate psyche comes across amusingly as ineffectual bedside manners.

Less helpful is Marjorie's mom (Lydia Franco-Hodges in a bad wig), whose complaints are.