Rita Ora parties at Vanity Fair bash

Rita Ora couldn't wait to let her hair down at the Vanity Fair Oscars after party.

The 24-year-old Brit was tasked with the honour of singing at the awards ceremony last night, performing Grateful from Beyond the Lights.

As soon as she had belted out the track, which was nominated for a best original song Academy Award, she took to Twitter to let her fans know what she planned on doing next.

"I just performed at the Oscars! Time to party!!!!" she excitedly tweeted.

"What an amazing experience thank you Oscars 2015 for having me perform tonight! (sic)"

She promptly headed to Vanity Fair's annual extravaganza, held in Los Angeles. And it was the third outfit change of the night for Rita, who slipped into a sheer black Donna Karan number with a long train.

"Thank you Donna Karen (sic)," she thanked the designer on Instagram, attaching a picture of herself in the show-stopping gown.

But it was a bit of an outfit clash for Rita, as model Irina Shayk turned up to the bash in an incredibly similar sheer black dress, with one stockinged leg completely on show.

Also at the event were lovebirds Sofía Vergara and Joe Manganiello, who were tactile as ever. The Modern Family actress took to her Whosay account to share a snap of the two of them, adding heart emoticons.

"Had a blast tonight at the @VanityFair #VFOscarParty #Oscars Thank you @Zegna (sic)," her fiancé Joe added on Twitter.

Also looking loved up were Jennifer Aniston and her fiancé Justin Theroux, who shared a cuddle for the cameras at the party.

Isla Fisher and husband Sacha Baron Cohen held hands as the attended the event together, with the pregnant actress looking ready to give birth any day now.

Model-and-actress Kate Upton also got into the spirit by posing for a picture to celebrate the iconic magazine behind the do.
"Can't wait for #VFOscarParty tonight! #annieleibovitz and I doing our best to recreate #vanityfair first cover over 100 years ago! (sic)," she shared on Instagram.