Kisses for the birthday boy! Liam Payne snuggles close to his girlfriend Sophia as they celebrate his 20th

If you're a One Direction fan - and particularly if Liam's your favourite - then you might want to look away now.

Seriously - it'll only upset you, trust us.

Because while the pop star no doubt adores his millions of fans, there is only one woman he has eyes for - girlfriend Sophia Smith.

The pair were seen getting up close and personal last night as they celebrated Liam's 20th birthday in London at the Funky Buddha nightclub.

Sophia looked gorgeous in a yellow jumpsuit which she teamed with black heels, but the only accessory worth adding was the cute boyband member on her arm.

And Liam - who was dressed more for a sports game than a night out - seemed equally as delighted to have her by his side and didn't let go of her hand once as they made their way inside the club.