The X Factor star recently married her French beau in secret, but she threw a celebratory bash in London for her showbiz friends and family
It's safe to say that Angelina Jolie's leg-baring antics at this year's Oscars have had a whacking great impact on the way celebs dress their pins now... check out Jessie J's impossibly high leg-slit in her dress at the charity amfAR Cinema Against Aids gala in Cannes.
As well as showing her increasingly famous face at the party with a good cause, Jessie also performed, and you should see how she worked that super leg-slit on stage...
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