Jennifer Lopez's Technicolor Dream Dress onAmerican Idol: All the Exclusive Details!

By now we’re used to Jennifer Lopez‘s bold wardrobe choices. From ultra-plunging necklines to cape-adorned gowns covered in sequins, the star loves to make a style statement. But she somehow managed to out -J.Lo herself, wearing a dramatic white design that transformed into a projection backdrop during her performance on American Idol Thursday night. And because we’restill talking about her crazy, extravagant work of art, we got all the exclusive details on the custom-made confection straight from the gown’s creator (and J.Lo’s stylist!), Mariel Haenn!

After changing from her judging Idol outfit (a navy, sequin Elie Saab romper!), Lopez wowed the crowd in a white off-the-shoulder design for her performance of “Feel the Light” from the upcoming animated film, Home. But viewers weren’t expecting what happened next: Lights, colors and special effects were projected onto the dress’s giant skirt and train, which covered the entire stage.

“It was actually a dress that she was wearing with a giant skirt that had a 20-foot radius,” Haenn said. “The projection was mapped out days in advance so they could work and perfect the animation and projection that added the extra wow factor.”