As a custom couture designer and entrepreneur, Randi Rahm has dressed scores of A-list celebrities with her one-of-a-kind creations. Her exclusive gowns range from $8,000 to $30,000. She also once designed a $2.5 million dress studded in 433 karats of diamonds that was worn at the Oscars. Rahm's signature "Diamond" gown was originally created with Swarovski crystals; that version and its various iterations, created with pearls or in different colors, are loaned for star-studded events, like Broadway premieres. Here, we take a look at that gown and Rahm's other stunning dresses donned by celebrities.

Related: Designer to the Stars Randi Rahm on Finding Success in the Fashion World

Carrie Underwood, Country Star

Image credit: Courtesy of Randi Rahm Studio

Country singing sensation Carrie Underwood wore this glamorous musty lavender satin ball gown, with a hand-beaded tulle underskirt, designed by Randi Rahm for the 2010 Country Music Association Awards.

Ashley Hebert, The Bachelorette

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Rahm designed several of Ashley Hebert's gowns, when she was the star of The Bachelorette, ABC's popular reality dating show, in 2011. She also designed Hebert's wedding gown: a double-faced silk-satin gown encrusted with a crystal-beaded leaf pattern. The cathedral length watteau train alone weighed over 40 pounds.

Fergie, The Black Eyed Peas

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Fergie, lead singer of the Black Eyed Peas, stepped out in a Randy Rahm tiger-pattern sequin mini dress for a Super Bowl party in 2011 in Dallas.

Julianne Hough, Singer and Actress

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Actress and singer Julianne Hough rocked the red carpet in this Randi Rahm coral gown, with a chiffon burnout pattern at the Academy of Country Music Awards in 2011.

Halle Berry, Actress

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Oscar-winning actress Halle Berry in a Randi Rahm flirty cocktail sun dress, with touch beading on the bust and ribbon details.

Edie Falco, Actress

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Edie Falco, best actress nominee for Nurse Jackie, walked the red carpet at the 2011 Emmy Awards in this elegant one-shoulder, blush tulle gown, framed on silk georgette, designed by Randi Rahm. 

Beyonce

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Pop star Beyonce sparkled in 2005, at a red carpet event, wearing a Randi Rahm hand-beaded chiffon gown trimmed in a golden Alencon lace.

Jennifer Lopez, Singer and Actress

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Superstar singer and actress Jennifer Lopez wore this hand-beaded, copper-sequin mini dress to the American Idol finalists party in 2012, when she served as a judge on the show.

Christina Aguilera, Singer and Songwriter

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Pop star Christina Aguilera dressed in a Randi Rahm modern deco-inspired, crepe-backed satin gown at the Clive Davis pre-Grammy party in Beverly Hills, Calif., in 2007.

 

Emily Maynard, The Bachelorette

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Randi Rahm designed several gowns for Emily Maynard, when she was the star of ABC's reality dating show, The Bachelorette, in 2012. Here, she adorns a strapless electric blue silk gown with chiffon details.

 

The $2.5 Million Gown

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Randi Rahm's most famous creation is this $2.5 million dress, sparkling with 433 karats of diamonds. Maria Menounos wore it when she was a correspondent for Entertainment Tonight at the 2004 Oscars.