Celebs put up their dukes – A-list stars and ‘bad girls’ alike are turning to the sweet science for fun, fitness and feeling of empowerment

Meg Ryan and Russell Crowe are doing it. So are Tonya Harding and Barry Williams. And come to think of it, Danny Bonaduce and Long Island Lolita Amy Fisher are doing it, too. Hey now, get your minds out of the gutter. We’re talking about that other contact sport– boxing.

Speaking of Chicago with Alejandro Escovado

Alejandro Escovedo refuses to be pegged. He is a rock ‘n’ roll veteran who began his career in the San Francisco punk band the Nuns, which opened for the Sex Pistols during their last concert in America. Escovedo went on to play lead guitar with the 80s cowpunk group Rank and File before fronting his own roots rock band, the True Believers.

Speaking of Chicago … with Vonda Shepard

Even Vonda Shepard is sick of rehearsing the theme to “Ally McBeal.” “I’ve sung it and heard it so many times on the radio that I can’t believe anyone still wants to hear it,” the singer says, phoning from the Los Angeles set of the Fox series. “But once we start playing the opening chords and I see how excited the audience gets hearing it, then I start to get excited, too. It’s the song that put my name out there, so I’ll perform it as long as people want to hear it.”

Five Questions with … Jason Schwartzman

The first time Jason Schwartzman was on David Letterman’s show, the young actor had a case of the nerves. “I walked out there and it was like being on a roller-coaster ride,” says Schwartzman, now 21. “He’s awesome! I love him. I want to campaign for him to be on Oprah. I don’t know why she won’t have him on. He’s great.” The feeling must be mutual. Schwartzman is scheduled to appear on Letterman’s gabfest twice this week. On Wednesday, his band, Phantom Planet, will perform a song from the new album “The Guest.” The following evening, Schwartzman returns solo to hype his latest film, “Slackers,” which opens Friday.

Speaking of Chicago … with SUPER DIAMOND

The first time Randy Cordero–lead singer of the Neil Diamond tribute band Super Diamond–met Diamond, he wasn’t sure what to expect. “He was so nice to us,” says Cordero, phoning from his San Francisco home. “He came backstage before one of our shows last year in Hollywood. We talked for about half an hour. He thanked me for what we were doing. I thanked him for not suing us. He was really cool and down to earth–just an all around nice guy.”

Benjamin Bratt finds rhyme, reason in poet role

Sitting in a suite at the Ritz-Carlton Hotel, Benjamin Bratt–who is polite, funny and easy on the eyes–isn’t oblivious to the effect he has on the women fluttering nearby. Dressed in grey trousers, a tight black pullover and black ankle boots, Bratt looks every bit the movie star he is about to become. His almond-shaped eyes are liquid and chocolate brown, and the few strands of grey hair flecking his sideburns are his only concession to age.

In town with Brian Lane Green

Brian Lane Green is sitting at a coffee shop not far from his Gold Coast hotel. He is oblivious to the second looks he attracts from other patrons. He’s too busy digging into his bowl of soup. “When you run around on stage every day wearing a loincloth, you are very conscious of what you eat,” says Green with a laugh. “I have a tendency to be round. Luckily, my muscles have memory, so they pop out during the shows.”

Five Questions with … Irma P. Hall

Five years ago, Irma P. Hall made a name for herself playing a blind woman named Aunt T in “A Family Thing.” She’s playing another character named Aunt T, only this time it’s a cartoon voice on “A Rugrats Kwanzaa.” The 66-year-old South Side resident, who is best known for her touching role as Big Mama in “Soul Food,” doesn’t consider herself an actress, but rather a former teacher who happens to act.

Guys and Dolls: Speaking of Chicago with Maurice Hines

Maurice Hines is a phenomenally talented dancer. But leave him alone in a room with two telephones and call waiting and he’s all thumbs. “I am so sorry,” Hines apologizes, after accidentally disconnecting one reporter while finishing up a call with another. “I never know what I’m doing. All the hotel phones have different buttons!”

Speaking of Chicago with Margaret Cho

Growing up, Margaret Cho had no pop culture role models. So, she selected Olivia Newton-John as her idol, even though the “Grease” star was about as white as they come. “She was Australian and foreign, so I identified with her,” says Cho. “Besides, she was so beautiful I wanted to be her. Everyone did.”

‘N Sync’s Lance Bass ‘On the Line’ in his first film

Envy me, girls. I am in Lance Bass’s hotel room and guess what? He happens to be here, too.
Never mind that we’re surrounded by his assistant, makeup artist, a handful of publicists and a photographer. I think I saw love in his eyes. OK, maybe it was just the sunlight reflecting from the windows of the W Hotel on Lake Shore Drive. But the point is, Bass–one-fifth of the phenomenally popular boy band ‘N Sync–is so charming he can even make cranky reporters smile.