The multitalented star, who emceed the fan-voted awards show on Sunday at the Microsoft Theater in Los Angeles, rocked nine outfits in total throughout the night from the red carpet to onstage -- and each was equally show-stopping.
See every glamorous ensemble, ahead.
First, the "Level Up" singer slayed the red carpet in an oversized cobalt blue plisse pantsuit by Balmain and large Jacquie Aiche turquoise jewelry. She styled her long wavy locks loose.
For her opening performance, Ciara got everyone moving with a stomping performance of her new single, "Melanin" in a custom Bryan Hearns outfit. She dressed in a glittery gold long-sleeve crop top, accented by sparkly corset boning detail, short shorts and Nike sneakers.
Next up, a head-turning leopard print Ashi Studio dress with dramatic puffy sleeves and train, accessorized with a fabulous diamond choker by Jacob & Co. and topped off with a doll-like high ponytail.
Ciara brought sparkles into the mix in a sequined orange jumpsuit from Georges Hobeika, which boasted a floor-trailing bow, and silver sandals.
The host literally looked like a Barbie doll in an embellished form-fitting pink Versace mini dress, matching ankle-strap heels and Daniella Kronfle serpentring.
Ciara was absolutely elegant in a high-neck long-sleeve crystal mesh midi dress by Alessandra Rich for her sixth look. Her slick 'do complemented the polished-yet-sexy vibe.
Next, she opted for a black-and-white paneled blazer and a flared pant from Balmain.
She then rocked a stunning white fringe coat and matching mini dress by Azzaro -- saving this look for holiday dressing inspiration, stat!
For her last look, Ciara wowed in a sexy Mugler outfit that featured a jacket with sheer paneling and matching capris as she joined Shania Twain and Taylor Swift onstage during the final performance of the night.
ET's Keltie Knight chatted with Ciara's makeup artist, Yolonda Frederick-Thompson and hairstylist, Cesar DeLeon Ramirez, on the red carpet ahead of Ciara's AMAs hosting debut. The glam team spoke on the inspiration behind Ciara's looks for the night.
"Ciara's a cool girl, so the inspiration is always cool," Ramirez said.
"The minute she starts dancing, it makes you wanna get up and dance as well. She’s just a party in itself and that’s her personality as well, so I say party, fun and gorgeous," he explained about the vibe of her hosting looks.
"Cool girl glam," Frederick-Thompson added.
See the best-dressed stars at the 2019 AMAs in the gallery below.