Fit for the silver screen! Katy Perry slips into a stunning metallic dress as she joins Hollywood's finest at amfAR Gala afterparty

Like the name of her 2014 hit, Katy Perry came over all 'Extraterrestrial' on Thursday night.

Slipping into something silver for the afterparty, the musician looked positively space age as she joined A-list guests after amfAR's 23rd Cinema Against AIDS Gala in Cannes.

Katy ditched her Spanish-inspired red-hot Flamenco dress in favour of a slinky metallic number, complete with kooky pom-pom earrings.

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Party time: Katy Perry slipped into a silver dress, her second of the night, to join stars at the afterparty of amfAR's 23rd Cinema Against AIDS Gala in Cannes on Thursday

Party time: Katy Perry slipped into a silver dress, her second of the night, to join stars at the afterparty of amfAR's 23rd Cinema Against AIDS Gala in Cannes on Thursday

Katy's ensemble nipped in at the waist and skimmed over her bust with fringing revealing her nude undergarments beneath.

Silver heels and a matching clutch bag completed the iridescent image as she made a quick change with her raven locks and headed for Hotel du Cap-Eden-Roc post-party.

Though unaccompanied by Hollywood hunk and new beau Orlando Bloom at the afterparty, Katy was in high spirits, posing against the kooky wallpaper and talking to Markus Molinari. 

Dazzling: She was positively space age in a metallic fringed number with matching accessories

Dazzling: She was positively space age in a metallic fringed number with matching accessories

Show-stopper: Katy ditched her Flamenco-inspired ensemble from earlier in the evening

Show-stopper: Katy ditched her Flamenco-inspired ensemble from earlier in the evening

In high spirits: She poked fun at the kooky wallpaper as she posed inside

In high spirits: She poked fun at the kooky wallpaper as she posed inside

Flying solo? Inside the bash, she was without new beau Orlando Bloom

Flying solo? Inside the bash, she was without new beau Orlando Bloom

Kooky: To the space age look, Katy added pompom earrings 

Kooky: To the space age look, Katy added pompom earrings 

Dazzling: Her companion Markus Molinari seemed to have chosen similar sartorial inspirations

Dazzling: Her companion Markus Molinari seemed to have chosen similar sartorial inspirations

Hanging out: In the absence of Orlando, Katy accompanied Kenneth Cole

Hanging out: In the absence of Orlando, Katy accompanied Kenneth Cole

Also continuing the party into the night on Thursday was actress Elle Fanning and fellow silver screen star Adrien Brody.

The model army led the way though, as Karlie Kloss, Barbara Palvin, Heidi Klum and Petra Nemcova headed to the afterparty. 

Musician Katy arrived at the star-studded gala event that night in striking off the shoulder and full-length Marchesa gown in scarlet.

The 31-year-old put on a jokey display alongside her beau Orlando, who had arrived to support the star ahead of her performance at the event. 

Photobombed! Katy couldn't resist pulling funny faces as she posed behind her boyfriend during the sit-down dinner at the event 

Photobombed! Katy couldn't resist pulling funny faces as she posed behind her boyfriend during the sit-down dinner at the event 

Dapper dude: Orlando Bloom, who had arrived to support Katy, looked handsome as ever, displaying his new earring 

Dapper dude: Orlando Bloom, who had arrived to support Katy, looked handsome as ever, displaying his new earring 

Doting beau: Orlando watched on as his girlfriend hit the red carpet

Cute couple: Dazzling in an off the shoulder scarlet gown, the 31-year-old singer turned heads, and no doubt caught the eye of her beau Orlando

Hello petal! Featuring dramatic ruffled sleeves and and an exquisite floral hemline, the Roar hitmaker ensured she pulled out all the stops at the prestigious event

Hello petal! Featuring dramatic ruffled sleeves and and an exquisite floral hemline, the Roar hitmaker ensured she pulled out all the stops at the prestigious event

Golden girl: Katy changed into a shredded golden cape and over-the-knee boots for her performance

Golden girl: Katy changed into a shredded golden cape and over-the-knee boots for her performance

Wowing the crowd: There was no missing Katy in her flamboyant ensemble

Wowing the crowd: There was no missing Katy in her flamboyant ensemble

Katy couldn't resist pulling funny faces as she photobombed her boyfriend during the star-studded gala.

Featuring dramatic ruffled sleeves and and an exquisite floral hemline, the Roar hitmaker ensured she pulled out all the stops when she arrived on the red carpet.

Later, she even made one further costume change when she performed at the event in a gold fringed outfit and thigh-high boots. 

Hollywood's finest: Elle Fanning continued the party into the night with star-studded guests

Hollywood's finest: Elle Fanning continued the party into the night with star-studded guests

Also partyingL Adrien Brody was there with Felipe Ortiz

Also partyingL Adrien Brody was there with Felipe Ortiz

Cute couple: Matt Bellamy was accompanied by model girlfriend Elle Evans

Cute couple: Matt Bellamy was accompanied by model girlfriend Elle Evans

Party time: Paris Hilton had changed her outfit especially to join the party

Party time: Paris Hilton had changed her outfit especially to join the party

Happy couple: Toni Garrn was with her boyfriend Chandler Parsons outside the party

Happy couple: Toni Garrn was with her boyfriend Chandler Parsons outside the party

Party tiome: Models Isabeli Fontana (left) and Petra Neomcova were gorgeous in their gowns

Party tiome: Models Isabeli Fontana (left) and Petra Neomcova were gorgeous in their gowns

Red-lipped: She wore a striking lip
Sexy: Her off-the-shoulder dress displayed decolletage

Still stunning: It;s little surprise that Karlie Kloss wanted to wear her dress again for the afterparty

Covering up: Heidi Klum wore a man's blazer as she talked to Kenneth Cole

Covering up: Heidi Klum wore a man's blazer as she talked to Kenneth Cole

Dressed to impress: Heidy de la Rosa fanned out her gown in cobalt blue

Dressed to impress: Heidy de la Rosa fanned out her gown in cobalt blue

Sassy: Julia Restoin Roitfeld was glamorous in animal print

Sassy: Julia Restoin Roitfeld was glamorous in animal print

Glamour girls: Barbara Palvin (right) teamed up with an equally glamorous companion

Glamour girls: Barbara Palvin (right) teamed up with an equally glamorous companion

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