On the annual Billboard Music Awards red carpet, anything goes. And I'm not just talking about the fashion!

This year, the celebrity attendees also used their hair and makeup to express their creativity, whether it was with glitter eyeshadow, purple lipstick or even pink hair.

Here are the best beauty looks from the big night.

Priyanka Chopra

I can't decide which I love more—Priyanka's thick, lustrous hair or her subtly colourful makeup. (I also dig her layered necklaces!) The lip colour is a lovely sheer berry, always my favourite shade on her, but the metallic purple and gold liners make it playful. Her lashes have just the right natural texture.

Priyanka is wearing: Concealer • Eyeliner in (Grape)vine • Mascara in Black • Lipstick in Charlotte

Olivia Wilde

With a high-necked gold lamé gown, you need to wear your hair up, and your makeup should probably be more understated. Olivia did just that with this loose, face-framing updo and warm smoky eyes. Notice how the darker shadow at the outer edges of her eyes makes them pop. 

Kiernan Shipka

Kiernan looks fresh, fun and age-appropriate (she's 19) in this glittery silver shadow with tiny star appliqués. A stained berry on her lips keeps things low-key, and of course, her skin and brows are perfection. The last time we saw her, she was blonde, but now her hair is a darker reddish hue. I love it!

Kiernan is wearing: Moisturizer • Tinted moisturizer • Concealer • Powder • Blush • Eyeshadow in Silver • Eyeshadow • Glitter in Silver and Gold • Stars (applied with eyelash glue) • Mascara in Pro Black (top lashes) • Mascara in Rich Black (bottom lashes) • Brow pomade • Lip balm • Lipstick in Diorinfinity

Ciara

Could Ciara's skin be any glowier? And those cheekbones, OMG! She totally pulls off the tight, high ponytail, and there's a soft Ombré effect happening with her lip colour, which I love. I just find the eyeliner a bit harsh, and the false lashes could be more natural (see: Priyanka).

Sophie Turner

Sophie played up her lashes in a big way, and I'm here for it. It's actually the lower ones that are the most dramatic, and her makeup artist confirmed that she used some falsies (although they don't look too unnatural). I also like the matte rosy taupe all the way around her eyes, and the bouncy blowout. Too much blush though? Maybe!

Sabrina Carpenter

Sabrina tried out this negative-space winged eyeliner, and it looks so good! Surprisingly, she kept her lashes very, very natural, and you know what? I don't hate the nude liner underneath each pupil. I think her beachy hair and big brows are gorgeous... but the lip fillers are getting a bit much!

Halsey

Her dress was a tragedy, but I can almost get behind Haley's beauty look. With her short, wet hair and bronzed skin, I think she can carry off the striking purple lipstick. I also like the lashes, faux freckles and highlighter. But was the extra dab of purple under each eye necessary? And do her brows need to be so angular? No and no. 

Halsey is wearing: Highlighter in Pink Moon • Eyeliner in Montauk • Eyeliner in Mixtape • Lipstick in Hip to the Beet

Ella Mai

Ella is channeling the 1990s in a tight skyscraper top knot, bold red lipstick and artfully arranged baby hairs (they're molded into curls, while two pieces were left straight). This is so unexpected and cool! Also, her matte but luminous skin is utterly flawless.

Taylor Swift

Did I mention that I'm in love with Taylor's new bangs? (It's to the point where I had mine cut the same way after seeing them here!) Unfortunately, the bangs are the only part of this look that I really like. I think there's a way to do purple eyeshadow with pink lipstick in a modern way, but this is not it. She reminds me of a figure skater!

Julianne Hough

Julianne's waved bob with straight ends is adorable on her, but I can't help but wish she'd tone down the platinum blonde. Either that, or the spray tan—because both together with the dark brown brows seems a little harsh. The same goes for the jet-black liner and pink blush. (And the powder or whatever is really drying out her skin.) I'd love to see her go back to this!

BTS

As much as I enjoyed all the other looks, I think we can all agree that BTS were the TRUE stars of this event! I mean... the hair, the lip stains, the SKIN! Are you not obsessed?! 

Who had your favourite (and least favourite) beauty look on this red carpet?