american idol stylist soyon an

Kevin Winter, Getty Images

"American Idol's" lucky 13 hit the big stage for the first time March 9.

With the spotlight on these showbiz season 10 newcomers, its veteran women's costume designer, Soyon An, had the fashionable task of making the ladies' style sing. (Miles Siggins does the honors for the men.)

Working with a $400 budget for each lady, Emmy-winner An mixed inexpensive and mid-range retail purchases and stitched up a few original looks to make the ladies sparkle. "I want to create a persona for them. I begin working on it the first time I get my hands with them."

Here, she gives us a behind-the-seams look at each "Idol" lady in order of appearance:

Lauren Alaina, Ashton Jones and Pia Toscano. American Idol

Lauren Alaina, Ashton Jones and Pia Toscano. Courtesy of Fox

Lauren Alaina: The Georgia peach kept it country casual to sing Shania Twain's "Any Man of Mine" in skinny jeans, a bedazzled, frilly cotton top and shoulder-skimming earrings from BeBe. Heart-shaped earrings were affixed to the top for extra bling. "She's 16. I want to keep her looking young and fresh," says An.

Ashton Jones: "I really wanted to bring out the diva in her wardrobe this week and the song choice made it perfectly easy," says An. Jones channeled Diana Ross, in a one-shoulder, body-skimming silver gown to perform the legend's "When You Tell Me That You Love Me."

Pia Toscano: The New Yorker hit a high note singing Celine Dion's version of "All By Myself" in a sexy, golden dress by ABS. An knew the frock was a perfect fit when Toscano saw it on her wardrobe rack and "gasped." An iridescent chiffon train was attached for added elegance to complete Toscano's personal vision. "She really wanted short in front, long in back," the designer says.

Hayley Reinhart, Thia Megia, Karen Rodriguez, Naimi Adedapo American Idol

Hayley Reinhart, Thia Megia, Karen Rodriguez, Naimi Adedapo. Courtesy of Fox

Hayley Reinhart: To sing LeAnn Rimes' "Blue" Reinhart went with her stylist's color-appropriate choice in a strapless, floor-length gown. "She loves pink, but with the raspy quality of her voice and the bluesiness of her song choice, a deeper, darker color seemed more appropriate," An says. Chiffon layers and a sexy neckline kept the overall look elegant, but hip.

Thia Megia: Wore a Betsey Johnson, ombre, strapless maxi-dress to sing Michael Jackson's version of "Smile." At 15, the soft, ethereal details, including her delicate jewelry, seemed spot-on to An.

Karen Rodriguez: Judges Jennifer Lopez and Steven Tyler flipped over the singer's sparkly, black "Selena" inspired crisscross top and coordinating pants.The ensemble was custom-made by An's team at her Kizmit Inc., label. Clear, but dramatic accessories balanced the dark impact.

Naimi Adedapo: Adedapo's entire look to perform a reggae-inspired version of Rihanna's "Umbrella" was styled around the singer's personal pair of super-cool Converse high-tops. Her funky Jagged Edge necklaces were purchased by An at LA boutique Church. "Naimi is so fashionably cool. I'm excited to tweak it and have America see it," An says.

Meanwhile, read about the honey blonde highlights Lopez has been rocking at the judges' table.