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13 August 2012, 12:32
The 'Price Tag' star hooked up with the British fashion icon ahead of her performance with Queen.
Jessie J wore two Vivienne Westwood designed outfits during her appearances at the London 2012 Olympic Games closing ceremony.
The singer delighted fans at the Olympic Stadium with two performances, kicking off with a rendition of 'Price Tag'.
Wearing a nude bodysuit taken from the Vivienne Westwood archive, the star then joined Tinie Tempah and Taio Cruz for a cover of The Bee Gees' 'You Should Be Dancing'.
Jessie later slipped into a Vivienne Westwood asymmetric catsuit to join Queen's Brian May in a performance of the band's landmark hit, 'We Will Rock You'.
Jessie J took to Twitter following her performance at the closing ceremony to thank everyone who was involved in London 2012.
She wrote: "Oh what a night! So proud to represent the UK! Congratulations to everyone! Booooooom!"
The 'Domino' singer also showed her playful side, posting a picture of herself striking Usain Bolt's trademark Lightning Bolt pose.
Jessie J does the Lightning Bolt impression backstage at the Olympic Closing Ceremony: (picture: Twitter)
Jessie joined a host of big stars at the closing ceremony, including The Spice Girls, who reunited especially for the event to perform 'Wannabe' and 'Spice Up Your Life'.
The past several weeks had seen an enormous number of rumours about which acts would be performing at the much hyped closing ceremony, directed David Arnold and Kim Gavin, and the three-hour live show was expected to be viewed by an estimated 900 million people around the world.
Jessie J wore a nude bodysuit by Vivienne Westwood to perform 'Price Tag':
Despite much speculation surrounding their appearance, Gary Barlow joined his Take That bandmates Howard Donald, Mark Owen and Jason Orange for a firework accompanied rendition of 'Rule The World'.
Later, The Who closed out the London 2012 Olympic Games closing ceremony with several hits culminating in their 1965 signature song 'My Generation'.
Jessie J later slipped into an asymmetric catsuit as she joined Queen's Brian May:
The ceremony also saw the Olympic flag officially passed on to the mayor of Rio De Janeiro Eduardo Paes, ready for the Olympic Games there in Brazil in 2016.