Liam Payne searches his girlfriend's name to defend her from online trolls.

The One Direction heart throb admitted to a fan on Twitter yesterday (13.09.13) he is worried Sophia Smith will be offended if she reads any hurtful comments written about her on social networking sites.

He wrote: ''I do it lots because I worry she might read it ... In the end she's just a girl like u sat reading Twitter on her phone. She doesn't deserve to sit and read all that - who does? (sic)''

The star has also previously used his account on the social networking site to defend the group's loyal followers who were the subject of a British Channel 4 documentary 'Crazy About One Direction' which looked at the extreme measures their super fans take to honour the group.

He had said: ''Just so all of you know we love you guys and we know how dedicated you are and tbh we can't believe it that you gus spend all you time on us.

''We couldn't give a f**k what any documentary says there dramatised for entertainment and full of bulls**t anyway we all know...How hard you work for us and see it everyday at our shows.

''Let's all take a step back and think about what we/you have all achieved... (sic)''.