Halloween was on a Wednesday this year, which means the celebrating lasted all week long, with star studded parties in Hollywood, Miami and NYC.

Paris Hilton and Kim Kardashian looked amazing just as we expected they would, but there were plenty of controversial and quirky costumes this year, thanks to Chris Brown (no need for an explanation -- see pic above), and Rihanna, who dressed as a pot princess. Wonder if she had any idea that Lady Gaga was planning a similar outfit?

Be sure to check out our massive gallery below and tell us who YOU think had the best costume this year!

That's one way to hide from prying eyes!

Reunited duo Rob Pattinson and Kristen Stewart donned transparent Halloween masks at Maroon 5's party at the Hollywood cemetery last night, and at first glance we would never have known it was the Twilight lovers!

R-Patz sported his signature jeans and baseball cap combo, while K-Stew stayed true to her grunge style in leggings, Converse, and a green military jacket. The pair held hands and were affectionate the entire night, which is a big departure from their usual efforts to avoid being seen together!

Maybe they are being more open with their relationship to prove to the world there is no longer trouble in paradise! While the couple partied the night away, the brunette beauty's fling Rupert Sanders enjoyed a family night of trick or treating with his scorned wife Liberty Ross and their children.

We still won't hold our breath for a happily ever after until the British hunk puts a ring on his lady love!

When it comes to dressing up for Halloween ... Lady Gaga seems to believe that less is definitely more.

The 26-year-old "Born This Way" songstress, who covered her breasts with a couple of sparkly cannabis leaves, Tweeted the above photo and the following:

"I was weed for Halloween. Best costume ever! It's so fun. Princess High the Cannabis Queen."

Back in September, Gaga talked about gaining 25 pounds over the past year. By the looks of those toned abs, seems as though Lady G has slimmed down!

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The Wanted made the crowd go wild outside Radio 1 in London.

The young boy band members signed autograph after autograph while posing for candid photos with their adoring fans.

Looks like they're following in the tradition of previous boy bands like New Kids On The Block, 'N Sync and The Beatles. These guys are definitely chick magnets!

He sure knows how to brighten our day!

Ben Affleck got coffee in Brentwood this morning, and despite the gloomy weather, the 40-year-old actor was in a good mood, and as usual, he looked smokin' hot. Does wife Jennifer Garner know how lucky she is? Who cares if he doesn't want to be a stay-at-home dad ... just look at how hot he is!

Ben has pretty much wrapped up promotional duties on Argo, and now that the holidays are coming, that means awards season is right around the corner. Think Ben will get any nods at the Oscars this year for his latest flick?

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It's not everyday you see Prince Charles sitting on a motorcycle, but we're lovin' it!

Prince William's dad, dressed to the nines, met up with some Poppy Day Ambassadors in London.

Poppy Day, also referred to as Remembrance Day, is a memorial day observed in Commonwealth countries since the end of World War I to remember the members of their armed forces who have died in the line of duty.

Next time, we'd love to see Prince Charles sporting a leather jacket.

Forget Hurricane Sandy -- Amanda Bynes is still in New York City!

The 26-year-old actress caused a scene at Beach Bum Tanning the other day when she purchased a Mystic spray-tan session and walked out of her private room and into the main salon area COMPLETELY NUDE, in search of goggles, according to an In Touch Weekly report.

"She walked out of the room completely naked," the eyewitness tells the magazine. "She didn’t seem to care that everyone saw her naked."

The insider added, "She seemed totally out of it. She took her time walking back to the Mystic room, dragging her fingers along the wall and smiling at customers who passed her … There was definitely something wrong with her."

After a handful of car accidents and run ins with the law in California, Bynes jetted off to N.Y.C. to pursue a fashion career earlier this fall, but it seems like all she's been doing is causing trouble! When will she get back on track?

Kendall Jenner is a model on the go!

Kim Kardashian's 16-year-old sis struck a pose in Sydney, Australia in a yellow bandage dress.

After strutting her ultra-thin bod, Kendall changed into a pair of white skinny jeans.

The stunning brunette and her sis Kylie have teamed up with Majestic Mills for their own clothing line. No doubt, these two siblings are going to design some fab looks!