Final answer:
Christian Dior is the Parisian Haute Couture designer known for the pouf skirt, rose prints, and designing Christina Aguilera's wedding dress.
Step-by-step explanation:
The Parisian Haute Couture designer known for the pouf skirt, rose prints, and designing Christina Aguilera's wedding dress is Christian Dior. Christian Dior was a prominent figure in the fashion industry during the mid-20th century and is famous for his innovative designs and elegant style. The pouf skirt, which features a voluminous, flared silhouette, was one of Dior's iconic creations. He frequently incorporated floral motifs, including rose prints, into his designs. Additionally, Dior had the honor of designing Christina Aguilera's wedding dress, showcasing his exceptional craftsmanship and talent.