Lookin' good, Lea! The star was radiant in a Fausto Puglisi frock and Christian Louboutin sandals.
Is this the sexiest look of the night? You betcha! Shay nails it in this lacy two-piece Misha Collection design.
There are plenty of words that come to mind upon seeing this Christian Dior dress (red hot, for example) but right now we're just going to go with: Stunning! Plus, her studded Brian Atwood sandals killer.
Saving the best for last! The actress finished off a very stylish week with this fun Vionnet ensemble paired with the perfect pink Kurt Geiger pumps.
Sister act! Kim and Kendall, looking flawless in Balmain and Oriett Domenech respectively, joined birthday girl Kylie, wearing Sass & Bide, on the blue carpet.
Yup, confirmed once again: The singer is really into the whole crop top trend! This time it's a mint tweed Novis number.
Well suited! The star looked elegant in her Saint Laurent lady tux.
Usually she goes for edgy, but this time Demi tried out a more conservative style with this ivory Elisabetta Franch dress—and we're liking the results!
Just when you think you've seen every print imaginable, the singer debuts this fun one on her Simply Intricate outfit.
The pop star kept it simple in a white George Chakra frock with nude pumps.
The singer paired her modest Sachin & Babi Noir crop top with a vintage leather pencil skirt.
Holy smokes! The night's co-host dazzled in a plunging (and backless!) Marc Jacobs mini dress.
No suit, no problem! The actor still looked swoon-worthy in a tee and jeans.
Winner of most contagious smile has got to be this guy!
Skin is in! The If I Stay star rocked a tiny Valentino tube top and short shorts.
The Begin Again actress mixed fabrics and prints with her Elie Saab dress.
The Disney star rocked head-to-toe highlighter pink with a Material Girl halter dress and Christian Louboutin pumps.
The actress brightened up in a custom Candies Couture floral frock by Johnny Wujek.
The night's co-host looked quite sharp in a silver suit jacket.
The Pretty Little Liar actress went with a crop top and maxi skirt combo.