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BEST: Ally Brooke, Normani Hamilton, Dinah-Jane Hansen, Lauren Jauregui and Camila Cabello
The women of Fifth Harmony stunned on the red carpet outside of the T-Mobile Arena in Las Vegas, rocking dramatic dresses in shades of plum.
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Performing at the show after some well-publicized turmoil, Kesha rose above in a royal printed purple suit. She added a black tie and metallic heels to the sharp number.
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BEST: Russell Wilson and Ciara
Ciara went bold on the pink carpet in a barely there metallic gown. The "I Bet" performer found the perfect accessory for her evening of hosting in her dapper fiancé, Russell Wilson.
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BEST: Kate Beckinsale
Kate Beckinsale was gorgeous as ever in pre-Memorial Day white, going glam in the plunging gown with banded sleeves.
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BEST: Laverne Cox
A habitual style star, Laverne Cox kept up her best-dressed streak in a gorgeous figure-hugging black gown with lace accents.
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BEST: Shawn Mendes
Shawn Mendes was simply chic in an all-black ensemble, pairing his monochromatic suit with black boots.
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Zendaya opted for an airy, nude number, baring her midriff in a high-waisted skirt and bralette. She kept her hair and makeup simple, choosing to focus on her red-carpet getup.
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Seal was completely chic from his head, hidden in a pair of mirrored shades, to his toes, covered in a pair of bold yellow shoes. He paired the stylish accessories with a textured gray coat, plunging collared shirt, and well-cut trousers.
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BEST: Keke Palmer
Presenting at the show, Keke Palmer turned heads in a burgundy close-fitting dress. The actress added animal-print ankle-strap heels and a top knot.
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BEST: DJ Khaled
DJ Khaled knew the keys to red carpet success in a textured black suit, finishing off the look with sharp metal-accented loafers.
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BEST: Nick Jonas
Nick Jonas made other attendees "Jealous" thanks to a trendy, relaxed ensemble. The Jonas Brother rocked a navy leather jacket with a pair of printed trousers and white slip-on sneakers.
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WORST: Z LaLa
Sometimes more is less. Singer Z LaLa took it a step too far in this voluminous outfit.
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WORST: Josh "The Fat Jew" Ostrovsky
Internet personality Josh "The Fat Jew" Ostrovsky was definitely going for something here — we're just not sure what it was.
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WORST: Jack Lawless, JinJoo Lee, Joe Jonas and Cole Whittle
The musicians of DNCE missed the mark on the pink carpet, looking more like Yellow and Blue Power Rangers than Billboard performers.
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WORST: Laura Marano
Actress and singer Laura Marano took asymmetrical style to a questionable next level for the Billboard Awards, sporting a collar on one side, a sleeve on the other, and confusion all around.
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WORST: Jessica Alba
In a rare misstep for the stylish star, Jessica Alba had a bit too much going on between her lace minidress with cutouts, over-the-knee boots hitting just at the hem, and a dramatic smokey eye worn with a painfully tight topknot.