The night 'Katy Perry' and 'Rihanna' partied in London with 'Ken Livingstone' and 'Pippa Middleton'

On the face of it, it looks like the party of a lifetime.

Katy Perry, Rihanna, the Queen, Lady Gaga, David Beckham and Johnny Depp all rubbing shoulders at the same private members' club in London.

But on closer inspection, all is not what it seems.

The 'a-list' guestlist for the party was in fact a group of celebrity lookalikes, gathered together by photographer Alison Jackson.

Jackson, famous for her lookalike photographs of the royals and celebs, gathered together some of the models she works with at the George Club for the fundraising bash in aid of the Spinal Injuries Association.

Also present were the 'Duke and Duchess of Cambridge', 'Simon Cowell', 'Gordon Ramsay', 'Sir Mick Jagger' and 'Ken Livingstone'.

Jackson, who is Ambassador for the Spinal Injuries Association, would no doubt have been able to fill an album with some of the pictures taken last night.