By Cassie Carpenter

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Hipster grunge fashion may be all the rage on catwalks and glossy magazine spreads this year, but Rumer Willis proved today that there is definitely such a thing as taking ripped jeans too far.

The 23-year-old daughter of Demi Moore and Bruce Willis experienced a wardrobe malfunction when her derrire came out of the very distressed denim shorts she was wearing while shopping at West Elm in Los Angeles.

Rumer was the very picture of 1995 grunge in her black-and-white plaid shirt and brown cowboy boots and, after thoroughly browsing the modern furniture store on Beverly Boulevard, she settled on an embroidered sea-green pillow.

Over-exposed: While shopping at West Elm today, Rumer Willis experienced a wardrobe malfunction thanks to the distressed denim shorts she was wearing

Over-exposed: While shopping at West Elm today, Rumer Willis experienced a wardrobe malfunction thanks to the distressed denim shorts she was wearing

Busting at the seams: The 23-year-old daughter of Demi Moore and Bruce Willis ran into trouble when her right butt-cheek came out of her ripped jean shorts

Busting at the seams: The 23-year-old daughter of Demi Moore and Bruce Willis ran into trouble when her right butt-cheek came out of her ripped jean shorts

The House Bunny actress recently debuted a darker hairdo with blue extensions courtesy of Great Lengths, the same company Christina Ricci used when she was tired of her chin-length bob.

However, Rumer's new black hair looked curly and dishevelled as she exited West Elm carrying her big black purse and the shopping bag carrying her precious new pillow.

The eldest Willis-Moore daughter recently joined Demi, Bruce, and sister Scout, 20, for her 18-year-old sister Tallulah's high school graduation earlier this month.

Pillow shopping: After thoroughly browsing the modern furniture store on Beverly Boulevard, she settled on an embroidered sea-green pillow

Pillow shopping: After thoroughly browsing the modern furniture store on Beverly Boulevard, she settled on an embroidered sea-green pillow

Hipster grunge fashion: Rumer was the very picture of 1995 grunge in her black-and-white plaid shirt and brown cowboy boots

'My baby sis graduating,' Rumer said, tweeting a picture of a cap-and-gowned Tallulah to her 178,000 followers.

Rumer once dropped out of USC after one semester, and Scout, who's currently studying at Brown University, was recently arrested for underage drinking.

New hair! The House Bunny actress recently debuted a darker hairdo with Great Lengths blue extensions

New hair! The House Bunny actress recently debuted a darker hairdo with Great Lengths blue extensions

Rather than university, the Whole Nine Yards actress has instead focused on her craft, appearing in films From Within, Sorority Row, Wild Cherry, and guest appearances on several TV series including a recent role as a pot dealer on Comedy Central's Workaholics.

She'll next star alongside Billy Zane and Dominic Purcell in horror-thriller The Ganzfeld Experiment, which comes out next February.

The budding chanteuse also took to the stage last month to belt out rock songs and jazz standards at Hollywood hot-spot The Sayers Club where she's performed three times this year.

Rumer dropped a dramatic amount of weight lately, and many believed it was due to the stress of her 49-year-old mother's split with 34-year-old husband Ashton Kutcher.

However, it appears there could be another reason behind Rumer Willis' rapidly shrinking frame -- she might soon become the face of Australian designer Charlie Brown's newest collection.

She already appeared in a campaign for haute couture label Badgley Mischka last year.

Here's what other readers have said. Why not add your thoughts, or debate this issue live on our message boards.

The comments below have been moderated in advance.

I'm with dave sampson. She has nice legs and bottom. I'm no spring chicken and 90% of the men I've known would prefer a great figure over a great face. Lets face it, beauty fades, but fat doesnt. Lets also hope she has a sparkling personality.

Nothing wrong with those shorts, I've seen worse on the high street and they were larger ladies than rumer. She seems comfortable wearing them so leave her alone. Everybody has there own ideas of clothing, it would be very strange if we all wore he same. People should be able to choose items of clothing without others talking about them.

Ok, I'm not clear what the story is... Daughter of famous actors wears clothes that the journalist doesn't like? Paparazzi take inappropriate photo and the DM paid for it?

I,ve put a few pair of those in the dustbin over the years.

A cross between a Willis and a Moore. Not a good look.

She has not been blessed with the beauty stick and looks and dresses a mess

DM - the definiution of a wardrobe malfunction is accidental exposure of intimate parts. In this case its clear that she left the house knowing what was on show !

The perils of being a fashion slave! On a side note, Rumer needs a fringe and some soft layers to widen her face. Having hair extensions only serves to lengthen it further.

Its meant to be like that and you know it. You just need something to fill up column inches.

Sorry but she is not attractive and the more people say she is the more I think she isn't.

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