Kim Kardashian, Katy Perry, Lady Gaga & more of this week's best & worst celeb style

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Kim Kardashian, Katy Perry, Lady Gaga & more of this week's best & worst celeb style
Rachel Zoe rocked her baby bump in this simple black and white dress.
Kim Kardashian definitely turned heads with this revealing look that we're loving.
We're not sure what kind of look Lady Gaga was trying to go for with this bizarre dress.
Two of our favorite beautiful ladies, Karlie and Freida, flashed their pearly whites at the opening of a Coach boutique Spain.
This flashy look was a difficult one to pull off, and we're not huge fans of the singer's look. We'd love to see Katy wearing this on stage, though!
We're slightly obsessed with J.Law, but this look just wasn't doing it for us on the red carpet.
From Brad to Maddox to Angelina, the family looked absolutely beautiful on the red carpet.
Funny lady Sarah Silverman was a vision in a blue and red polka dot specked dress on the red carpet.
"The Hills" star was spotted at LAX looking casual and cool. 
Jena Malone looked gorgeous at the NYC red carpet premiere for "The Hunger Games: Catching Fire" wearing a simple Valentino look.
Stunning in a simple black and white look, Kelly Ripa looked radiant as always.
We've got to say it: we're just not huge fans of Khloe Kardashian's slicked-back hair. We love the reality star's hair when it's flowing front and center!
Elizabeth Banks took a style risk with this Jenny Packham jumpsuit on the red carpet, but we're loving the look.
What's going on with the double shirt, Heidi?
What's there to even say about Courtney? Bethenny did look great in long-sleeved plaid, though!
Allison Williams looked gorgeous in vibrant purple on the red carpet.
Kim took NYC by storm this week with her super chic and sexy looks. We're loving the color-blocking going on with this outfit.

From red carpet events to premiere parties, celebs were out in full force this week looking hot, and in some cases, not so hot. From Kim Kardashian's super sexy outfits to Katy Perry's metallic dress, we've rounded up all of this week's best and worst celeb looks.

Click through the gallery above to check out the best and worst of this week's celeb style!
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