A very revealing cutout dress, a mustard yellow mess and a bondage-inspired ensemble -- stars are rocking all the wrong trends this week!

Rumer Willis wore a risque ensemble to the Elle Women in Music celebration on Tuesday, showing off more than she intended. 

The 25-year-old -- who DJed a set at the event -- paired a black crop top with the Isabella Square skirt by Franziska Fox that featured large side-panel cutouts. While Bruce Willis and Demi Moore's daughter surely meant to flash her long legs, we can't imagine that she wanted to reveal her pink panties. Oops!

Rose McGowan raised some eyebrows on the red carpet at the Sundance London Film and Music Festival on Thursday, sporting matching mustard yellow trousers and a top with the word "Niente" across the front. She completed the unflattering look with a red stiff-brimmed hat and black combat boots.

"Niente" means "nothing" in Italian, and there is nothing chic about this ensemble!
And, Jennifer Hudson stepped out to the Brown Shoe Company's Celebration of 100 Years on the New York Stock Exchange in New York City on Wednesday night, donning a bondage-inspired, lace-up dress by Agent Provocateur and leather knee-high Via Spiga boots. She completed the daring look with a pixie cut and a bright red lip.

The singer certainly loves to show off her bod, but this dress is way too tight! (No one likes an underarm muffin top!)

But they weren't alone -- see more of this week's worst dressed stars in the gallery above.

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