"Army" animal print, sheer harem trousers and a nightgown for a night on the town -- stars are rocking all the wrong trends this week!

Kim Kardashian stepped out at the Vogue Foundation Gala during Paris Fashion Week on Wednesday, wearing a leopard pencil skirt with a green belt and a black and gold ribbed long-sleeve. 

The reality star just looks tacky next to the "army" of Balmain models, including little sister Kendall Jenner, who joined her at the high-fashion event. 

Kristen Stewart landed on our worst dressed list this week for donning this white Chanel crop top and these matching sheer harem pants to the designer's show during Paris Fashion Week on Monday. The "Twilight" actress also debuted a new cropped cut at the event, which made her look like she just rolled out of bed. 

This new 'do, which features choppy layers with longer pieces in front, makes the 24-year-old beauty look much older!

Speaking of rolling out of bed, Rihanna raised eyebrows when she stepped out in a pale pink, floor length, silk nightgown to watch the FIFA World Cup Semifinals on Tuesday.

While the "Diamonds" singer is no stranger to making a fashion statement, this sleepwear-inspired is not one of our favorites -- it should be worn for sleep and sleep alone.

Click "Launch Gallery" above to see more of this week's worst dressed stars!

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