Jennifer Lopez went for a monochromatic look. 1
Before hitting the stage to perform her new single, "Dinero", alongside DJ Khaled, J.Lo walked the red carpet in a Roberto Cavalli Fall 2018 burgundy crocodile ensemble.
Luis Fonsi arrived with wife Agueda Lopez. 2
The Puerto Rican singer, who took home five awards for his mega-hit "Despacito," walked the red carpet in a cream and black ensemble, while his wife look stunning in a white Julien Macdonald gown, Loree Rodkin jewelry and Louboutin heels.
Cristina Aguilera made an entrance in a custom 16Arlington dress. 3
Before debuting her single "Fall In Line" on the Billboard stage, the singer hit the red carpet in a pinstriped, off-the-shoulder, custom 16Arlington dress.
Demi Lovato chose an animal print Dior gown. 5
The singer's dress is from Christian Dior Resort 2009 collection.
Taylor Swift looked amazing in this Atelier Versace dress. 6
The winner of the Top Female Artist and Top Selling Album awards wore a gorgeous one-shoulder, soft pink velvet dress embellished with delicate embroidery and feather details, from the Atelier Versace Spring 2018 collection. She accessorized her dress wirth Hueb morganite earrings and silver Casadei platforms.
Hailey Baldwin showed off some serious cleavage. 7
The model wore a nude Alexandre Vauthier Fall 2018 dress.
DJ Khaled came dressed in blue. 8
After walking the red carpet in a blue suit and sneakers, DJ Khaled hit the stage to perform "Dinero" with J.Lo.
Kelly Clarkson showed off her new slimmer figure in a black gown. 9
The host of the night looked amazing in this Christian Siriano dress with sculpted neckline and embellished lining.
Ke$ha brought her very own style to this red carpet. 11
The singer brought some bohemian vibes in a fringe cape, hat and cowboy boots.
Mila Kunis showed off some legs. 12
The actress, who rocked a new hairstyle, chose a look from David Koma's Fall 2017 collection.
Tyra Banks channeled her inner Maleficent. 13
The model wore a figure-hugging, black velvet dress with a ruffled collar and shoulders by Marc Bouwer.
Jenna Dewan wore a Zuhair Murad Spring 2018 leather dress. 14
The World of Dance host looked like a total bombshell in this mini dress.
John Legend hit this red carpet in a Gucci print blazer. 15
How awesome is his outfit?
Ashlee Simpson went went full boho glam. 16
The guest presentor wore a Yanina Spring 2017 Couture gown.
Nick Jonas chose a simple look. 18
The singer looked elegant in black pants and a red shirt.
Z Lala made heads turn with her crazy outfit. 19
The singer-songwriter wanted to make sure all eyes were on her and she accomplished exactly that with this outfit and hairstyle.
Rapper T.I. showed some love for the Chicago White Sox. 20
Although he's from Atlanta, the rapper showed some love for Chicago's baseball team, completing his look with a White Sox hat.