Kate Middleton was surrounded by male admirers last night as she joined thousands of revellers at Nelson Mandela's 90th birthday concert in Hyde Park.

The 26-year-old attended the star-studded gig without her boyfriend Prince William, who is currently pursuing his military career aboard HMS Iron Duke in the Caribbean.

But Kate still had a great time and she wasn't short of male attention as she smiled and chatted with her friends.

Game for a laugh: Kate Middleton enjoys a giggle with two male friends

Kate watched acts including Amy Winehouse, Sugababes, Leona Lewis, Razorlight and Queen at the birthday party, which was introduced by Will Smith and his wife Jada Pinkett-Smith.

The Independence Day actor quoted Peter Gabriel from the stage, telling the crowd and millions watching on television at home: 'If the world could only have one father, the man that we would choose to be our father would be Nelson Mandela.'

Kate and her friends enjoyed performances by stars including Amy Winehouse

As a frail Mandela arrived on stage halfway through the concert, the celebrities and crowd burst into a rendition of Happy Birthday.

As well as marking the former South African president's 10th decade alive, the event also aimed to raise money for his 46664 AIDS charity - named after the prison number he was given during his 27-year incarceration in Robben Island.

Solo: Kate had a great time despite Prince William's absence

Sociable: Kate chats with another male friend