OMG. Marvin from JLS goes back to school to sing an acapella version of Everybody In Love for ChildLine...

Check out this vid of Marvin when he dropped in unexpected on an assembly at Harefield Academy to chat to students about bullying. Aww...look at him go all shy when they ask him to sing!

Bullied for singing and wearing glasses? Whoever did that must be eating their words now he's a massive celeb!

Now for the serious bit: he didn't just pop into the school on a whim. He's promoting a ChildLine campaign, How u feelin? with its new online service and its 0800 1111 number. Who's a busy boy then?

What would you do if he turned up at your school? We don't think we'd be able to handle it!

For more info on ChildLine go to www.childline.org.uk