Singer Crystal Bowersox brought an alternative vibe to the "American Idol" stage last season and the same was true of her Oct. 10 Chicago wedding to fellow musician and longtime friend Brian Walker.

The husky-voiced performer walked down the aisle in a floor-length, eco-friendly dress custom made from imported hemp by Vermont fashion designer Tara Lynn, who specializes in sustainable apparel made from natural fibers.

The singer's dress featured a detachable train embellished with macramé, seashells, and beads that Lynn tells StyleList she has been collecting since childhood. The bodice was accented with a floral blossom detail and (of course!) some light crystal embellishments.

"It was simple but beautiful, which was really perfect for Crystal," said Lynn, who calls Bowersox " a really easy-going, sweet girl."

Walker and Bowersox announced their engagement several weeks ago. They were married in a small, intimate ceremony in the nightclub where they first met, People reports.

The singer's 18-month-old son, Tony, her child from a previous relationship, served as ring bearer in a linen suit, the magazine reports.

Lynn, who doesn't watch television, tells StyleList she did not know who her celebrity client was when Bowersox first contacted her about making the wedding gown.

The singer flew to Lynn's solar-powered Sutton, Vt., studio Oct. 7 for a last-minute consultation and fitting. "My projects usually take a bit longer than this," says Lynn, "but she was working on a really tight schedule and we went for it."

The sustainable quality of Lynn's designs was what Bowersox had in mind for her bridal gown, the designer explains. "She told me she saw one of my dresses online, loved it, and called to talk about getting a dress," says Lynn. "When she got here I did recognize her because the only time I've ever seen 'American Idol,' she was on."

During Bowersox's two-day visit, "She was totally my ideal customer," Lynn says. "She was just chill, relaxed, and very happy and excited to be getting married and having this dress for her day."

The singer, who finished second on season 9 of "Idol," brought her guitar and regaled Lynn and her team with a song from her upcoming CD over breakfast.

Lynn, who studied fashion design at FIT, has been designing apparel since 1999.

While creating a dress for Bowersox was a coup, Lynn says the performer was "very typical" of her custom-bridal clients.

"They seek me out because they are attracted to the designs and my philosophy," she explains. "I like to work in fabrics that are sustainable and natural like hemp and silk and organic cotton. I sometimes work in vintage fabrics and some people find that really appealing."

Lynn recently made a wedding dress from old white eyelet curtains taken from the bride's New York City apartment. "She was on a tight budget, but we made her something really beautiful," the designer says.

Bowersox could easily wear her wedding dress again. "It's not too much and without the train, it has a casual, pretty, very comfortable feel," Lynn says. "We designed it so it would be very easy for her to walk around and enjoy being with her family and friends."

Lynn, meanwhile, is anxious to see the crooner and her groom in their wedding photos. "Are there any out yet?" she asks. "I can't wait to see."

Meanwhile, Bowersox, who is a diabetic, tweeted a request for wedding donations from fans go to the Juvenile Diabetes Research Fund. She also made light of her marital status. "Officially mamasox," she tweeted, later correcting her own tweet to say, "I meant walkersox. Ha, ha, ha!!! That's hilarious."

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