Scream queen! Chris Brown stops by as Rihanna goes green for her Hollywood Halloween party

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She was the picture of sophistication earlier in the day, but Rihanna went all out for her Halloween party on Wednesday evening.
Dressed all in green, the popstar looked like a carnival queen, wearing a green veil and sparkling green dress as she hosted the bash at Greystones Manor in West Hollywood.
Arriving fashionably late with friends Evelyn Lozada and Shaniece Hairston, the star looked like she'd put a lot of effort into the outfit in a complete transformation from her demure look earlier in the day for the Halloween parade.
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Party girls: Evelyn Lozada tweets a picture of herself with Rihanna and Shaniece Hairston ahead of the partyWhile reality star Evelyn went all out in a red wig as Ariel from The Little Mermaid, her daughter Shaniece wore a revealing black dress and eye mask.
Proving how close they now are, Rihanna's former boyfriend Chris Brown stopped by the party, going down the bad taste route dressed as a gun-toting Arab.
Paris Hilton went for a take on Batman's Robin, wearing a short green skirt and a red push-up bustier, complete with yellow cape and eye mask.
Green goddess: Rihanna looks ready to party as she makes her way into her own party Grand entrance: Rihanna makes sure that she arrives to her own party in style on Wednesday night
Heading home: Rihanna jumps into the back off her car after the party, still in her green costumeLindsay Lohan tried to keep a low profile as she arrived in her car, clearly dressed as a character from Top Gun.
 

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• And the award for the bad taste outfit of Halloween goes to… Chris Brown dressed as gun toting Arab man
• Grown-up Rihanna turns demure for awards ceremony... but manages to flash her bra in see-through top

Sporting long, black hair and and what looked like a pilot's uniform, she kept her head down as she pulled up to the party with a female friend, dressed in the same costume.
What a night: Rihanna looks like she's had a great night as she jokes with friends on the way home Bad taste: Chris Brown stops by to see Rihanna dressed as what looks like an armed Arab
Girl wonder: Paris Hilton invokes Robin in a push up bustier and tiny green skirt Low profile: Lindsay Lohan keeps her head down as she shows up to the party in a Top Gun inspired costumeFrench fashion designer Christian Audigier and model girlfriend Nathalie Sorensen wore matching make-up and avant-garde black outfits as they headed into the party.
US comedian and actor Kevin Hart went for a typically light-heated outfit, dressed in a 1970s inspired costume.
Wearing a flared all-in-one boiler suit, the star added platform shoes and an afro wig under a cap. In fashion: Designer Christian Audigier and other half Nathalie Sorensen opt for matching face paint for Rihanna's party
Retro chic: Comedian Kevin Hart goes back to the 1970s with flared trousers, platform shoes and an afro He's her Batman: Paris is joined by boyfriend River Viiperi who's dressed as BatmanEarlier in the day, Rihanna had worn a sheer black top visibly showed her bra as she arrived at a Halloween parade award ceremony.
TheDiamonds star was crowned the Queen of West Hollywood Halloween Parade and given the key to the city by the mayor of West Hollywood, John Duran, at a ceremony on Wednesday night.
Perhaps in a nod to her new royal status the Umbrella star chose a more demure look than usual.
Teamedwith the tight, sheer sleeveless top Rihanna chose a form-fitting below-the-knee black skirt with swagged fringing detail.
Sheer naughty: Rihanna's bra is visible under her top as she arrives at the West Hollywood Hallowen Parade in West Hollywood, Los Angeles, on Wednesday night
Her shoes were also sheer - black pumps with transparent netting.
As she arrived to the parade on La Cienega Boulevard in West Hollywood she smiled and waved to fans and appeared in good spirits.
Despitethe new lady-like look the 24-year-old had her numerous tattoos on display, as well as vampish red lipstick on and quite a lot of bling,
After Rihanna was given her award, sparkling crystal crown and the over-sized key to the city, she larked about on the red carpet for photographers pulling sexy faces and jauntily tilting her royal tiara to the side.
Demure: The 24-year-old singer goes for a much more grown-up and glamorous look than usual Just before she was crowned queen, Rihanna stood quietly on the stage, smiling.
She recently announced plans for an ambitious mini tour ahead of the release of her latest album.
Rihanna has vowed to perform seven 'intimate' gigs in seven night in seven different countries - one of which is said to be the UK.
The 777 Tour is due to kick off on November 14 but no other location details have been released yet.

Rihanna and approximately 150 journalists representing 82 countries, a select number of fans and her entourage will be travelling in a Boeing 777 from country to country, ithas been reported.

Her latest album, Apologetic, is her seventh album in seven years.
Ambitious: Rihanna recently announced plans to embark on a seven gigs in seven countries in seven days tour Lucky number: The 777 Tour is to promote her next album which will be the seventh in seven yearsMeanwhile former beau Chris Brown was noticeably missing.
Instead of being close by to cheer on Rihanna, who he is hotly rumoured to be dating again, the Look at Me Now singer stopped by the Supper Club's Halloween Costume Freak Fest in nearby Hollywood. 
Brown, 23, wore lemon skinny jeans and a leather jacket and looked slightly dishevelled as he headed into the club.
No show: Meanwhile Chris Brown was seen at the Supperclub's Halloween Freak Fest in Hollywood on Wednesday night