This week was all about the perfect party dress. And the winners are...

Jennifer Lopez in Haute Hippie at the Venus Goddess Razor Global Ambassador unveiling. As usual, J.Lo achieved a head-to-toe glow in this nude blouse and sequined wrap-skirt dup, which she topped off with jewels and Christian Louboutin pumps.

Rachel Bilson in Burberry Prorsum at the "Waiting for Forever" premiere. Leather trimming added a sexy touch to this otherwise girly, ruffled-chiffon dress, which the actress topped off with ankle-strap pumps.

Heidi Klum in Rachel Roy at Lucky's March Issue Celebration. Posh gets a playful makeover in this magenta-streaked sheath. The fearless fashionista pumped up the volume even more with strappy sandals and a set of cage rings.

Ginnifer Goodwin in Monique Lhuillier at the Children Awaiting Parents event. The always put-together "Big Love" actress looked like a piece of art in this color-splashed and tinsel-accented, illusionary-inset dress, which she brightened up with red peep-toes.

Kim Kardashian in an asymmetrical gold mini at the Kardashian Glam Pack of Silly Bandz Launch Party. Kim appeared to be having a Lady Gaga moment in this origami-style, foam dress and, while somewhat out of character, I think her overall look (which also also consisted of gold jewel detailing and nude platforms) worked.

Photos (left to right): Kevin Mazur/WireImage; Jon Kopaloff/FilmMagic; Donato Sardella/WireImage; John Shearer/Getty Images; Jason LaVeris/FilmMagic