Harry Styles gives fan a birthday she won't forget as he serenades her.

The One Direction heart-throb surprised Olivia McKee on her 18th birthday when he appeared on stage and kissed her on the cheek in front of all her friends and family.

It was organised by her millionaire father Noel who arranged for the star to be at the party at the Great John Street Hotel in Manchester.

A spokesman for the 'Little Things' hitmaker said Olivia was a family friend, and he was not paid for his appearance.

Olivia later tweeted: ''Oh my god he kissed me. I love Harry. Best night of my life.''

Her friends also took to Twitter to show their appreciation for the birthday treat.

Beth Moore wrote: ''Hugged Harry Styles and my bestest friend kissed him!!! (sic)''

It isn't the first time this week the star has been seen with fans.

On Thursday (14.02.13) Harry started his Valentine's Day with a meal for one in Nando's chicken joint and was happy to pose for pictures with shocked diners.