By Stephen M. Silverman
Updated September 26, 2001 11:23 AM

MARRIED: Fiddler Martie Seidel, 31, of the Dixie Chicks, wed Irishman Gareth Maguire, age unreported, on Aug. 10 in Kailua, Dixie Chicks spokeswoman Kathy Allmand confirmed Monday. The ceremony took place at a house being rented by Dixie Chicks lead singer Natalie Maines and her husband, Adrian Pasdar. “We are planning a formal ceremony in Ireland next summer with our families,” said Martie Maguire. “The wedding was so last minute that so many special people were not there to share it with us. But we just couldn’t wait” . . . SUBDUED: The red carpet will be missing and stars will trade tuxedoes for business suits in a muted Emmy Awards intended to reflect the nation’s somber mood, the ceremony’s executive producer, Don Mischer, said Tuesday. The plans are said to be reminiscent of the carefully understated Academy Awards ceremonies held during World War II. Mischer has been consulting with the Academy of Television Arts & Sciences and host network CBS, which will air the live broadcast on Sunday, Oct. 7 . . . SLATED: Bill Cosby will join Jerry Seinfeld’s Oct. 8 “Stand Up for New York” benefit at New York’s Carnegie Hall, to aid the Fireman’s and Policeman’s Widow and Children’s Fund and Twin Towers Fund. Will Farrell, George Wallace and Colin Quinn will also appear. Ticket prices range from $100 to $2,500 . . . DONATED: “Tonight” show host Jay Leno, 51, will give a free performance Saturday at the MGM Grand hotel-casino in Las Vegas, as a way to spur the flagging economy there. The comedian said he was prompted to do the complimentary show after hundreds of Strip employees lost their jobs when hotel occupancies plummeted after the attacks. “All I ask is that you tip your waiters and waitresses,” Leno said on his TV show. “We have to turn this situation around” . . . REVEALED: A full-page ad in last Sunday’s New York Times contained the simple (and unsigned) message: “Imagine all the people living life in peace.” The line, of course, comes from the John Lennon song “Imagine,” and the ad was the doing of his widow, Yoko Ono, confirmed her spokesman Eliot Mintz. “She felt it would be more effective if her name wasn’t on it,” he said, adding that Ono, 68, also plans to erect a Times Square-area billboard with another message from Lennon’s lyrics: “Give peace a chance” . . . STATED: Brooklyn-born Barbra Streisand, 57, who has been quiet of late, despite the devastation to her hometown, has posted a message on her official Web site, where she often expresses her political views. It reads, “In light of recent events I strongly believe we must support our government despite our disagreements on certain policies such as those relating to environmental, educational, social and other specific issues. My past concerns about such matters still pertain but at this point in time I have removed several articles from my Web site in an effort to encourage national unity instead of partisan divisions. Thank you.”