Plot summary
While filming an adaptation of The Princess and the Pea, Barbie questions the director's bizarre creative choices which results in her being fired. Immediately afterwards, Barbie is lambasted on social media and receives a phone call from Ken who breaks up with her. Heartbroken and to get away from her troubles, Barbie goes on vacation to Paris to visit her aunt Millicent, an esteemed fashion designer. Meanwhile, Barbie's friends, Teresa and Grace, go to confront Ken where it's revealed that the breakup was really a recording by Barbie's rival Raquelle, which she made while he was reading a script. Ken decides to rush to Paris to amend the situation with Barbie.
In Paris, Barbie learns from rival fashion designer, Jacqueline, that Millicent is going out of business. Barbie meets Millicent and her assistant Alice and is informed that her aunt has lost work due to negative reviews and has since sold the building to a restaurant franchise known as "Hotdogeteria".
Alice takes Barbie to the attic and tells her about the magical creatures who supposedly lived in the fashion house. Placing one of Alice's original designs in a magic wardrobe, Barbie and Alice find and recite the chant to summon the magical creatures, who introduce themselves as the "Flairies", Shine, Shimmer, and Glimmer. Impressed by Alice's design, the Flairies use their magic to enhance it with sparkles. As the fashion house is the source of the Flairies' power, Barbie and Alice decide to put on a fashion show featuring new designs by Alice to raise money and save the building.
Jacqueline soon finds out about the Flairies and kidnaps them and demands they add sparkle to her own designs. Finding the outfits uninspiring, the Flairies warn Jacqueline that their magic might be unstable. Jacqueline ignores them and plans to put on her own fashion show the same night as Millicent's.
Despite the Flairies' disappearance, Millicent is inspired by Alice's designs and helps work on the line for the fashion show. Later that night, Barbie's poodle, Sequin, and Millicent's dog and cat, Jacques and Jilliana, are alerted to the Flairies' location by a trail of sparkles. The three pets sneak into Jacqueline's and rescue them. The next day, Barbie, Alice, and Millicent awaken to find sparkle added to all their new outfits, and an elaborate setup for the fashion show.
That night, Jacqueline presents her fashion show, however, the Flairies' magic backfires and the outfits start to rot on the runway. Repulsed, the audience leaves and flocks to Millicent's across the street. Barbie models the new designs in a spectacular fashion show. In a finale, Glimmer uses her magic to transform Barbie's gown, revealing her own talent as a designer. Soon after, Ken arrives, having faced numerous detours on his journey, and reaffirms his love for Barbie and kisses her, with the Flairies transforming his clothes into a new suit. An audience member places a large order for pieces from the line, and the payment is enough for Millicent to buy back the building from the Hotdogeteria owner.
A remorseful Jacqueline, who watched the fashion show, apologizes for her actions, which Millicent accepts and even agrees to work with her sometime. Liliana Roxelle, Paris's top fashion critic, congratulates them on an impressive show and invites them to a party. As they leave, Barbie is approached by a studio representative who invites her to work on a new film as a director.
