Harry Styles from One Direction surprised birthday day, Olivia McKee, when he turned up unexpected at her 18th birthday party at Manchester's Great John Street Hotel to wish her happy birthday on Friday night (February 15).

McKee was celebrating with 100 guests, when Styles sauntered in and planted a birthday kiss on her cheek.

McKee was quick to tell her Twitter followers by tweeting:

'Harry styles came to my 18th bitchez'

Before boasting: 'Oh my god he kissed me.'

She later tweeted the singer and posted: '@Harry_Styles thank you so much to coming to my 18th xxxxx'.

McKee left the hotel yesterday morning (February 16) wearing a leopard print onesie.

McKee's father, Noel, 42, and his brother Darren are reported to be worth around £67million after founding the car sales website, webuyanycar.com.

Speaking to the Sunday Mirror, Noel said about Styles turning up to his daughter's bash: "What can I say? It was wonderful."

One Direction went into a recording studio in Yorkshire yesterday (February 17).

Watch One Direction's Red Nose Day campaign film footage below, as well as the birthday party footage: