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Mark Zuckerberg - When he's not in court wearing a suit, Facebook's top man can be seen dressing like a college student.

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Justin Bieber - Beliebers will try to convince you Bieber is a fashion icon. Don't beliebe them.

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Matthew McConaughey - We know he doesn't wear deodorant, but sometime he actually looks like he doesn't wash at all.

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Ashton Kutcher - The actor is pretty inconsistent. One day he looks sharp, the next day he's spotted dressed like a '70s vagabond.

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Jared Leto - He surely thinks of himself as some sort of fashion god. But here's a tip for you, Jared—sometimes less is more.

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John Mayer - We're sure the singer is thinking, "Oh I'm a singer-songwriter, I only focus on my art and not on my clothes."

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Moby - Moby pulls off the suburban geography teacher look pretty well. We really can't tell the difference!

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Adam Sandler - The actor whose net worth is estimated at almost half a billion dollars, is one of the worst-dressed men in Hollywood.

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Charlie Sheen - He parties like a rock star, he hangs out with rock stars, but he does look a mess sometimes. 

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Kit Harington - In 2018, Jon Snow from 'Game of Thrones' was elected the worst-dressed man on the planet by GQ.

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Dennis Rodman - Yes we know, Rodman has always been a bit eccentric. But sometimes his outfits did border on the ridiculous.

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Benicio del Toro - We're not really sure what happened here. The sad thing is that he probably doesn't have a clue either.

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Guy Fieri - Come on Guy, surely you can afford a tailored suit that actually fits!

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Richard Simmons - Imagine walking into your gym and finding all the personal trainers wearing this outfit.

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will.i.am - I've got a feeling, that tonight you chose a bad outfit. 

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MC Hammer - His pants became legendary—you have to give him that. But we're in the 21st century and there really isn't a reason to wear them anymore.

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Mickey Rourke - How he fit into those jeans, we'll never know. The actor truly deserves a spot on the list. 

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Wesley Snipes - The actor constantly looks like his fashion never evolved from the '90s.

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Morrisey - Here's the singer at another one of his shows, revealing some chest hair and wearing sweatpants. Classy. 

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LMFAO - Wow they look so cool with their '90s-inspired party ensembles. Except they don't.

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PewDiePie - Felix Arvid Ulf Kjellberg, better known by his online nickname, PewDiePie, is an internet comedian and YouTuber with poor fashion taste.

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Louis Theroux - Producer and director Louis Theroux's basic clothes don't earn him any points in the style department.

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DJ Marshmello - DJ Marshmello's mask looks like he plopped a white bucket on over his head.

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Perez Hilton - Celeb blogger Perez Hilton surely likes his extravagant outfits. But there are limits, Perez, and you should know you're crossing the ridiculous line.

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Howard Stern - What's with the gloves, Howard? Are you going to put a radio spell on us?

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Lil Jon - The American rapper has surely had his faux pas moments.

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Michael Cera - Cera is the embodiment of the nerd kid. He should get out of character off-screen though.

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Paul Merton -

British actor, comedian and writer, Paul Merton, has some difficulties choosing patterns that go well together.

See also: The most memorable Met Gala men's fashion looks in recent years

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