Obscure pixie lott song on youtube, anyone know it by any chance?

Hiya there, I was hoping to find a pixie lott song (I'm pretty sure it was a cover, not an original) sung acapella with a group of friends in a park in London. it was filmed by a friend of hers maybe... it was a happy lovesong I think and there was a guy she was sitting with who joined in. They might have been sitting at the top of a hill... anyway I remember really loving it but can't find it anywhere so does anyone know it and if so could they post a link please? thanks :)